Provision is here made for the poor of God's people, and the pacifying of their consciences under the sense of guilt. Those that were not able to bring a lamb might bring for a sin-offering a pair of turtle-doves or two young pigeons; nay, if any were so extremely poor that they were not able to procure these so often as they would have occasion, they might bring a pottle of fine flour, and this should be accepted. Thus the expense of the sin-offering was brought lower than that of any other offering, to teach us that no man's poverty shall ever be a bar in the way of his pardon. The poorest of all may have atonement made for them, if it be not their own fault. Thus the poor are evangelized; and no man shall say that he had not wherewithal to bear the charges of a journey to heaven. Now,

I.If the sinner brought two doves, one was to be offered for a sin-offering and the other for a burnt-offering, Lev 5:7. Observe, 1. Before he offered the burnt-offering, which was for the honour and praise of God, he must offer the sin-offering, to make atonement. We must first see to it that our peace be made with God, and then we may expect that our services for his glory will be accepted. The sin-offering must make way for the burnt-offering. 2. After the sin-offering, which made atonement, came the burnt-offering, as an acknowledgment of the great mercy of God in appointing and accepting the atonement.

II.If he brought fine flour, a handful of it was to be offered, but without either oil or frankincense (Lev 5:11), not only because this would make it too costly for the poor, for whose comfort this sacrifice was appointed, but because it was a sin-offering, and therefore, to show the loathsomeness of the sin for which it was offered, it must not be made grateful either to the taste by oil or to the smell by frankincense. The unsavouriness of the offering was to intimate that the sinner must never relish his sin again as he had done. God by these sacrifices did speak, 1. Comfort to those that had offended, that they might not despair, nor pine away in their iniquity; but, peace being thus made for them with God, they might have peace in him. 2. Caution likewise not to offend any more, remembering what an expensive troublesome thing it was to make atonement.

Tenth part of an ephah - About three quarts. The ephah contained a little more than seven gallons and a half.

But if he be not able to bring two turtledoves, or two young pigeons,.... Which is supposing a man to be in the poorest circumstances he can well be; and such is the grace and goodness of God, that he has provided for the atonement and forgiveness of the poorest, as well as of the rich:

then he that hath sinned shall bring for his offering the tenth part of an ephah of fine flour for a sin offering; which is an omer, Exo 16:36 and is as much as a man can eat in one day, as Aben Ezra remarks:

he shall put no oil upon it, neither shall he put any frankincense thereon; to distinguish it from the common meat offering, which had both, Lev 3:1 and to make it as easy, and as little chargeable to the poor as possible, both oil and frankincense being things of value; and some think that these were prohibited, to show that atonement and forgiveness, and even the salvation of men, are not owing to grace in them, comparable to oil, or to their prayers, signified by frankincense, and so to any or all of their duties, but to Christ alone, and his atoning sacrifice: or these were forbidden, because emblems of joy and gladness, and therefore not so proper at a confession of sin, and humiliation for it: or rather to show how disagreeable and offensive sin was to the Lord, being contrary to grace, of which oil was an emblem, and far from being acceptable to him, which frankincense might signify; and therefore being prohibited, might denote how unacceptable, yea nauseous, sin is to him; which agrees with the reason given:

for it is a sin offering, and therefore must not be honoured, as Jarchi, or must have everything removed from it that is beautiful and amiable, as Ben Gersom, such as oil and frankincense.

he shall bring his trespass offering unto the Lord for his sins which he hath sinned--A trespass offering differed from a sin offering in the following respects: that it was appointed for persons who had either done evil unwittingly, or were in doubt as to their own criminality; or felt themselves in such a special situation as required sacrifices of that kind [BROWN]. The trespass offering appointed in such cases was a female lamb or kid; if unable to make such an offering, he might bring a pair of turtledoves or two young pigeons--the one to be offered for a sin offering, the other for a burnt offering; or if even that was beyond his ability, the law would be satisfied with the tenth part of an ephah of fine flour without oil or frankincense.