For God hath chosen Jacob Other reasons are given afterwards why they should praise God, drawn from his government of the world. But as it was only the children of Abraham who were favored with the knowledge of God at that time, and were capable of praising him, the Psalmist directs them to the fact of their having been chosen by God to be his peculiar people, as affording matter for thanksgiving. The mercy was surely one of incomparable value, and which might well stir them up to fervent gratitude and praise, adopted as they were into favor with God, while the whole Gentile world was passed by. The praise of their election is given by the Psalmist to God -- a clear proof that they owed the distinction not to any excellency of their own, but to the free mercy of God the Father which had been extended to them. He has laid all without exception under obligation to his service, for "he maketh his sun to rise on the evil and on the good." (Matthew 5:45.) But he bound the posterity of Abraham to him by a closer tie, such as that by which he now adopts men generally into his Church, and unites them with the body of his only-begotten Son.

For the Lord hath chosen Jacob unto himself - The descendants of Jacob. He has selected them from among all the inhabitants of the earth to be his special people.
And Israel for his peculiar treasure - The word here rendered treasure, means that which is acquired; property; wealth. They were what God possessed, owned, or claimed among all the people of the earth as especially his own. He had chosen them; he had redeemed them; he had made them his own, and he regarded them with the interest with which anyone looks on his own property, the fruit of his own toil. See Exodus 19:5; Deuteronomy 7:6; Deuteronomy 32:9; 1-Kings 8:53.

For the Lord hath chosen Jacob - This is a third reason. He has taken the Israelites for his peculiar people, סגלתו segullatho, his peculiar treasure; and now has brought them home to himself from their captivity and wanderings.

For the LORD hath (c) chosen Jacob unto himself, [and] Israel for his peculiar treasure.
(c) That is, has freely loved the posterity of Abraham.

For the Lord hath chosen Jacob unto himself,.... To be his own special people, and not another's; for his own service, and for his glory; and to be an habitation for himself, and to be for ever with him. This is not to be understood personally of Jacob, though a chosen vessel of mercy; nor of his natural posterity as such, though chosen as a nation to outward favours; for not all they, only some of them, were chosen to special grace and glory, a remnant according to the election of grace: but mystical and spiritual Jacob and Israel are meant, even the whole church and people of God, whether Jews or Gentiles; these God has chosen, of his own free grace and good will, to all the blessings of grace and glory, and that from all eternity; which choice will remain firm and immutable, in time and for ever; and therefore is worthy of praise and thanksgiving, now, and to all eternity;
and Israel for his peculiar treasure; by whom they are accounted as such; even as the peculiar treasure of kings, as silver, gold, jewels, and precious stones; as his inheritance, his portion, and peculiar people; see Exodus 19:5.

God's choice of Israel is the first reason assigned for rendering praise; the next, His manifested greatness in creation and providence.