Moses
Psalm 40:15BSB·traditional attribution

May those who say to me, “Aha, aha!” be appalled at their own shame.

John Calvin Reformed @genevareformer

PSALM 40 David, being delivered from some great danger, and it may be, not from one only, but from many, extols very highly the grace of God, and by means of this, his soul is filled with admiration of the providence of God, which extends itself to the whole human race.

Commenting on Psalm 40:1-17

C.H. Spurgeon Reformed Baptist @princeofpreachers

Let them be desolate, or amazed; even as Jesus was desolate in his agony, so let his enemies be in their despair when he defeats them. The desolation caused in the hearts of evil spirits and evil men by envy, malice, chagrin, disappointment, and despair, shall be a fit recompense for their cruelty to the Lord when he was in their hands.

Matthew Henry Presbyterian @wholebiblehenry

The psalmist, having meditated upon the work of redemption, and spoken of it in the person of the Messiah, now comes to make improvement of the doctrine of his mediation between us and God, and therefore speaks in his own person.

Commenting on Psalm 40:11-17