David
Psalm 137:9BSB·traditional attribution

Blessed is he who seizes your infants and dashes them against the rocks.

John Calvin Reformed @genevareformer

PSALM 137 At the Babylonish captivity the established order of God’s worship was overthrown, and the Psalmist complains, in the name of the Church at large, of the taunts which the enemy east upon the name of God, addressing at the same time a word of comfort to his people under their captivity, to cheer them with the hope of deliverance. Psalm 137:1-4 1.

Commenting on Psalm 137:1-9

C.H. Spurgeon Reformed Baptist @princeofpreachers

Happy shall he be, that taketh and dasheth thy little ones against the stones. Fierce was the heart of the Jew who had seen his beloved city the scene of such terrific butchery. His heart pronounced like sentence upon Babylon. She should be scourged with her own whip of wire.

Matthew Henry Presbyterian @wholebiblehenry

The pious Jews in Babylon, having afflicted themselves with the thoughts of the ruins of Jerusalem, here please themselves with the prospect of the ruin of her impenitent implacable enemies; but this not from a spirit of revenge, but from a holy zeal for the glory of God and the honour of his kingdom. I.

Commenting on Psalm 137:7-9