Complete Commentary on the Whole Bible, by Matthew Henry, at sacred-texts.com
(Psa 136:1-9) God to be praised as the Creator of the world.
(Psa 136:10-22) As Israel's God and Saviour.
(Psa 136:23-26) For his blessings to all.
Forgetful as we are, things must be often repeated to us. By "mercy" we understand the Lord's disposition to save those whom sin has rendered miserable and vile, and all the provision he has made for the redemption of sinners by Jesus Christ. The counsels of this mercy have been from everlasting, and the effects of it will endure for ever, to all who are interested in it. The Lord continues equally ready to show mercy to all who seek for it, and this is the source of all our hope and comfort.
The great things God did for Israel, when he brought them out of Egypt, were mercies which endured long to them; and our redemption by Christ, which was typified thereby, endures for ever. It is good to enter into the history of God's favours, and in each to observe, and own, that his mercy endureth for ever. He put them in possession of a good land; it was a figure of the mercy of our Lord Jesus Christ.
God's everlasting mercy is here praised for the redemption of his church; in all his glories, and all his gifts. Blessed be God, who has provided and made known to us salvation through his Son. May we know and feel his redeeming power, that we may serve him in righteousness all our days. May He who giveth food to all flesh, feed our souls unto eternal life, and enliven our affections by his grace, that we may give thanks and praise to his holy name, for his mercy endureth for ever. Let us trace up all the favours we receive to this true source, and offer praise continually.