David
Psalm 117:2ESV·traditional attribution

For great is his steadfast love toward us, and the faithfulness of the LORD endures forever. Praise the LORD!

John Calvin Reformed @genevareformer

PSALM 117 Psalm 117:1-2 1. Praise Jehovah, all ye nations; magnify him:, all ye peoples. “That all the nations here, and in the next word all peoples, signify, in the greatest latitude, all the nations, all people of the Gentile world, even πᾶσαν κτίσιν, ‘the whole creation,’ and κόσμον ἅπαντα, ‘the whole world,’ Mark 16:15, appears both by Matthew 28:19, where, parallel to those phrases...

Commenting on Psalm 117:1-2

C.H. Spurgeon Reformed Baptist @princeofpreachers

For his merciful kindness is great toward us. By which is meant not only his great love toward the Jewish people, but towards the whole family of man. The Lord is kind to us as his creatures, and merciful to us as sinners, hence his merciful kindness to us as sinful creatures. This mercy has been very great, or powerful.

Matthew Henry Presbyterian @wholebiblehenry

There is a great deal of gospel in this psalm. The apostle has furnished us with a key to it (Rom 15:11), where he quotes it as a proof that the gospel was to be preached to, and would be entertained by, the Gentile nations, which yet was so great a stumbling-block to the Jews.

Commenting on Psalm 117:1-2