David
Psalm 115:9ESV·traditional attribution

O Israel, trust in the LORD! He is their help and their shield.

John Calvin Reformed @genevareformer

PSALM 115 It is obvious that this psalm was penned when the Church was deeply afflicted. Unworthy as they are to be heard by God, the faithful, nevertheless, offer up supplications to him for deliverance, lest his holy name might be exposed to scorn and reproach among the heathen.

Commenting on Psalm 115:1-18

C.H. Spurgeon Reformed Baptist @princeofpreachers

O Israel, trust thou in the Lord. Whatever others do, let the elect of heaven keep fast to the God who chose them. Jehovah is the God of Jacob, let his children prove their loyalty to their God by their confidence in him.

Matthew Henry Presbyterian @wholebiblehenry

In these verses, I. We are earnestly exhorted, all of us, to repose our confidence in God, and not suffer our confidence in him to be shaken by the heathens' insulting over us upon the account of our present distresses.

Commenting on Psalm 115:9-18