These verses look forward to the mercies that were yet wanted. Those that had come out of captivity were still in distress, even in their own land (Neh 1:3), and many yet remained in Babylon; and therefore they rejoiced with trembling, and bore upon their hearts the grievances that were yet to be redressed. We have here, 1. A prayer for the perfecting of their deliverance (Psa 126:4): "Turn again our captivity. Let those that have returned to their own land be eased of the burdens which they are yet groaning under. Let those that remain in Babylon have their hearts stirred up, as ours were, to take the benefit of the liberty granted." The beginnings of mercy are encouragements to us to pray for the completing of it. And while we are here in this world there will still be matter for prayer, even when we are most furnished with matter for praise. And, when we are free and in prosperity ourselves, we must not be unmindful of our brethren that are in trouble and under restraint. The bringing of those that were yet in captivity to join with their brethren that had returned would be as welcome to both sides as streams of water in those countries, which, lying far south, were parched and dry. As cold water to a thirsty soul, so would this good news be from that far country, Pro 25:25. 2. A promise for their encouragement to wait for it, assuring them that, though they had now a sorrowful time, yet it would end well. But the promise is expressed generally, that all the saints may comfort themselves with this confidence, that their seedness of tears will certainly end in a harvest of joy at last, Psa 126:5, Psa 126:6. (1.) Suffering saints have a seedness of tears. They are in tears often; they share in the calamities of human life, and commonly have a greater share in them than others. But they sow in tears; they do the duty of an afflicted state and so answer the intentions of the providences they are under. Weeping must not hinder sowing; when we suffer ill we must be doing well. Nay, as the ground is by the rain prepared for the seed, and the husbandman sometimes chooses to sow in the wet, so we must improve times of affliction, as disposing us to repentance, and prayer, and humiliation. Nay, there are tears which are themselves the seed that we must sow, tears of sorrow for sin, our own and others, tears of sympathy with the afflicted church, and the tears of tenderness in prayer and under the word. These are precious seed, such as the husbandman sows when corn is dear and he has but little for his family, and therefore weeps to part with it, yet buries it under ground, in expectation of receiving it again with advantage. Thus does a good man sow in tears. (2.) They shall have a harvest of joy. The troubles of the saints will not last always, but, when they have done their work, shall have a happy period. The captives in Babylon were long sowing in tears, but at length they were brought forth with joy, and then they reaped the benefit of their patient suffering, and brought their sheaves with them to their own land, in their experiences of the goodness of God to them. Job, and Joseph, and David, and many others, had harvests of joy after a sorrowful seedness. Those that sow in the tears of godly sorrow shall reap in the joy of a sealed pardon and a settled peace. Those that sow to the spirit, in this vale of tears, shall of the spirit reap life everlasting, and that will be a joyful harvest indeed. Blessed are those that mourn, for they shall be for ever comforted.

They that sow in tears shall reap in joy. A proverbial expression, encouraging faith in prayer put up for the return of the captivity, whether in a literal or spiritual sense. Praying or seeking the Lord is sowing in righteousness, Hos 10:12; which is often attended with tears and weeping; the issue of them is not always seen soon: these, like seed, lie buried under the clods, but take effect and will rise up in due time: saints should wait patiently for a return of them, as the husbandman for the fruits of the earth; in due time they will produce a large crop of blessings, a plentiful harvest, which the praying saint will reap with joy; as those that prayed and waited for the redemption in Jerusalem; and as those that pray for the latter day glory, the conversion of the Jews, the fulness of the Gentiles, and the destruction of antichrist; the souls under the altar have been sowing in tears, but before long they will reap in joy, Rev 6:9. It may be applied to the state and condition of saints in common in this life; now is their sowing time, and careful they should be that they sow not to the flesh, but to the spirit: and a sorrowful time it is, on account of inward corruptions, Satan's temptations, divine desertions, and the imperfection of their services; but before long they will reap life everlasting, reap in joy, and be in the fulness of it; now they weep, then they shall rejoice; now they mourn, then they shall be comforted.

Psalms 126:6