When the people of God were gathered together in the solemn day, the day of the feast of the Lord, they must be told that they had business to do, for we do not go to church to sleep nor to be idle; no, there is that which the duty of every day requires, work of the day, which is to be done in its day. And here,

I.The worshippers of God are excited to their work, and are taught, by singing this psalm, to stir up both themselves and one another to it, Psa 81:1-3. Our errand is, to give unto God the glory due unto his name, and in all our religious assemblies we must mind this as our business. 1. In doing this we must eye God as our strength, and as the God of Jacob, Psa 81:1. He is the strength of Israel, as a people; for he is a God in covenant with them, who will powerfully protect, support, and deliver them, who fights their battles and makes them do valiantly and victoriously. He is the strength of every Israelite; by his grace we are enabled to go through all our services, sufferings, and conflicts; and to him, as our strength, we must pray, and we must sing praise to him as the God of all the wrestling seed of Jacob, with whom we have a spiritual communion. 2. We must do this by all the expressions of holy joy and triumph. It was then to be done by musical instruments, the timbrel, harp, and psaltery; and by blowing the trumpet, some think in remembrance of the sound of the trumpet on Mount Sinai, which waxed louder and louder. It was then and is now to be done by singing psalms, singing aloud, and making a joyful noise. The pleasantness of the harp and the awfulness of the trumpet intimate to us that God is to be worshipped with cheerfulness and joy with reverence and godly fear. Singing aloud and making a noise intimate that we must be warm and affectionate in praising God, that we must with a hearty good-will show forth his praise, as those that are not ashamed to own our dependence on him and obligations to him, and that we should join many together in this work; the more the better; it is the more like heaven. 3. This must be done in the time appointed. No time is amiss for praising God (Seven times a day will I praise thee; nay, at midnight will I rise and give thanks unto thee); but some are times appointed, not for God to meet us (he is always ready), but for us to meet one another, that we may join together in praising Do. The solemn feast-day must be a day of praise; when we are receiving the gifts of God's bounty, and rejoicing in them, then it is proper to sing his praises.

II.They are here directed in their work. 1. They must look up to the divine institution which it is the observation of. In all religious worship we must have an eye to the command (Psa 81:4): This was a statute for Israel, for the keeping up of a face of religion among them; it was a law of the God of Jacob, which all the seed of Jacob are bound by, and must be subject to. Note, Praising God is not only a good thing, which we do well to do, but it is our indispensable duty, which we are obliged to do; it is at our peril if we neglect it; and in all religious exercises we must have an eye to the institution as our warrant and rule: "This I do because God has commanded me; and therefore I hope he will accept me;" then it is done in faith. 2. They must look back upon those operations of divine Providence which it is the memorial of. This solemn service was ordained for a testimony (Psa 81:5), a standing traditional evidence, for the attesting of the matters of fact. It was a testimony to Israel, that they might know and remember what God had done for their fathers, and would be a testimony against them if they should be ignorant of them and forget them. (1.) The psalmist, in the people's name, puts himself in mind of the general work of God on Israel's behalf, which was kept in remembrance by this and other solemnities, Psa 81:5. When God went out against the land of Egypt, to lay it waste, that he might force Pharaoh to let Israel go, then he ordained solemn feast-days to be observed by a statute for ever in their generations, as a memorial of it, particularly the passover, which perhaps is meant by the solemn feast-day (Psa 81:3); that was appointed just then when God went out through the land of Egypt to destroy the first-born, and passed over the houses of the Israelites, Exo 12:23, Exo 12:24. By it that work of wonder was to be kept in perpetual remembrance, that all ages might in it behold the goodness and severity of God. The psalmist, speaking for his people, takes notice of this aggravating circumstance of their slavery in Egypt that there they heard a language that they understood not; there they were strangers in a strange land. The Egyptians and the Hebrews understood not one another's language; for Joseph spoke to his brethren by an interpreter (Gen 42:23), and the Egyptians are said to be to the house of Jacob a people of a strange language, Psa 114:1. To make a deliverance appear the more gracious, the more glorious, it is good to observe every thing that makes the trouble we are delivered from appear the more grievous. (2.) The psalmist, in God's name, puts the people in mind of some of the particulars of their deliverance. Here he changes the person, Psa 81:6. God speaks by him, saying, I removed the shoulder from the burden. Let him remember this on the feast-day, [1.] That God had brought them out of the house of bondage, had removed their shoulder from the burden of oppression under which they were ready to sink, had delivered their hands from the pots, or panniers, or baskets, in which they carried clay or bricks. Deliverance out of slavery is a very sensible mercy and one which ought to be had in everlasting remembrance. But this was not all. [2.] God had delivered them at the Red Sea; then they called in trouble, and he rescued them and disappointed the designs of their enemies against them, Exo 14:10. Then he answered them with a real answer, out of the secret place of thunder; that is, out of the pillar of fire, through which God looked upon the host of the Egyptians and troubled it, Exo 14:24, Exo 14:25. Or it may be meant of the giving of the law at Mount Sinai, which was the secret place, for it was death to gaze (Exo 19:21), and it was in thunder that God then spoke. Even the terrors of Sinai were favours to Israel, Deu 4:33. [3.] God had borne their manners in the wilderness: "I proved thee at the waters of Meribah; thou didst there show thy temper, what an unbelieving murmuring people thou wast, and yet I continued my favour to thee." Selah - Mark that; compare God's goodness and man's badness, and they will serve as foils to each other. Now if they, on their solemn feast-days, were thus to call to mind their redemption out of Egypt, much more ought we, on the Christian sabbath, to call to mind a more glorious redemption wrought out for us by Jesus Christ from worse than Egyptian bondage, and the many gracious answers he has given to us, notwithstanding our manifold provocations.

This he ordained in Joseph for a testimony,.... That is, this law concerning the blowing of trumpets on the new moon, and the keeping the solemn feast at the full of the moon, was made to be observed by all Israel, who are meant by Joseph, for a testimony of God's good will to them, and of their duty and obedience to him:

when he went out through the land of Egypt, or "over it" (b); which some understand of Joseph, who is said to go over all the land of Egypt, to gather in provision against the seven years of famine, Gen 41:45 and Jarchi says that his deliverance from prison was at the beginning of the year, and was advanced in Pharaoh's court: and the meaning is, either "when he", the Lord, "went out against the land of Egypt", so Arama, in order to slay their firstborn; and when he passed over Israel, and saved them; marched through the land in his indignation, and went forth for the salvation of his people, Exo 11:4 then was the ordinance of the passover appointed: or when Israel went out of Egypt, designed by Joseph, some little time after, while in the wilderness, and dwelling in tents, the feast of tabernacles was instituted; but rather this shows that the feast of passover is before meant, which was instituted at the time of Israel's going out of Egypt, and was the solemn feast day ordained for a statute, law and testimony in Israel; and that the new moon, or month rather, on which the trumpet was to be blown, was the month Abib, the beginning of months, by an ordinance of God, Exo 12:2.

where I heard a language that I understood not; here the prophet represents the people of Israel in Egypt; though the Septuagint, Vulgate Latin, Syriac, and Arabic versions, read,

he heard, and he understood not and the language is either the voice of God out of the fire, which before was never heard in this unusual manner, nor understood, Deu 5:24 or the speech of Moses, who had Aaron for his mouth and spokesman; or rather the Egyptian language, which was not understood by the Israelites without an interpreter, Gen 42:23 which sense is confirmed by Psa 114:1, and this is mentioned as an aggravation of their affliction in Egypt; see Jer 5:15.

(b) "in ipsum exeundo", Montanus; "cum exiret ipse super terram", Pagninus.