Then follows the second clause, Jehovah! in the middle of the years revive thy work. By the work of God he means the condition of his people or of the Church. For though God is the creator of heaven and earth, he would yet have his own Church to be acknowledged to be, as it were, his peculiar workmanship, and a special monument of his power, wisdom, justice, and goodness. Hence, by way of eminence, he calls here the condition of the elect people the work of God; for the seed of Abraham was not only a part of the human race, but was the holy and peculiar possession of God. Since, then, the Israelites were set apart by the Lord, they are rightly called his work; as we read in another place,