The word hdwtb bethodah, which we render with thanksgiving, is properly with the confession-offering or sacrifice. See on the title.

Bless his name. ] Bless Jehovah, that he is your Elohim; see ver. 3. In our liturgic service we say, "Speak good of his name;" we cannot do otherwise; we have nothing but good to speak of our God.

Matthew Henry Commentary

--This song of praise should be considered as a prophecy, and even use as a prayer, for the coming of that time when all people shall know that the Lord he is God, and shall become his worshippers, and the sheep of his pasture. Great encouragement is given us, in worshippin God, to do it cheerfully. If, when we strayed like wandering sheep, he has brought us again to his fold, we have indeed abundant cause to bless his name. The matter of praise, and the motives to it, are very important. Know ye what God is in himself, and what he is to you. Know it; consider and apply it, then you will be more close and constant more inward and serious, in his worship. The covenant of grace set dow in the Scriptures of the Old and New Testament, with so many ric promises, to strengthen the faith of every weak believer, makes the matter of God's praise and of his people's joys so sure, that how sad soever our spirits may be when we look to ourselves, yet we shall have reason to praise the Lord when we look to his goodness and mercy, an to what he has said in his word for our comfort __________________________________________________________________

Original Hebrew