Here is, 1. The duty we are called to - to praise the Lord, to praise his name; praise him, and again praise him. We must not only thank him for what he has done for us, but praise him for what he is in himself and has done for others; take all occasions to speak well of God and to give his truths and ways a good word. 2. The persons that are called upon to do this - the servants of the Lord, the priests and Levites that stand in his house, and all the devout and pious Israelites that stand in the courts of his house to worship there, Psa 135:2. Those that have most reason to praise God who are admitted to the privileges of his house, and those see most reason who there behold his beauty and taste his bounty; from them it is expected, for to that end they enjoy their places. Who should praise him if they do not? 3. The reasons why we should praise God. (1.) Because he whom we are to praise is good, and goodness is that which every body will speak well of. He is good to all, and we must give him the praise of that. His goodness is his glory, and we must make mention of it to his glory. (2.) Because the work is its own wages: Sing praises to his name, for it is pleasant. It is best done with a cheerful spirit, and we shall have the pleasure of having done our duty. It is a heaven upon earth to be praising God; and the pleasure of that should quite put our mouths out of taste for the pleasures of sin. (3.) Because of the peculiar privileges of God's people (Psa 135:4): The Lord hath chosen Jacob to himself, and therefore Jacob is bound to praise him; for therefore God chose a people to himself that they might be unto him for a name and a praise (Jer 13:11), and therefore Jacob has abundant matter for praise, being thus dignified and distinguished. Israel is God's peculiar treasure above all people (Exo 19:5); they are his Segullah, a people appropriated to him, and that he has a delight in, precious in his sight and honourable. For this distinguishing surprising favour, if the seed of Jacob do not praise him, they are the most unworthy ungrateful people under the sun.

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 Exo 19:5.