David
Psalm 6:9ESV·traditional attribution

The LORD has heard my plea; the LORD accepts my prayer.

John Calvin Reformed @genevareformer

PSALM 6. David, being afflicted by the hand of God, acknowledges that he had provoked the Divine wrath by his sins, and, therefore, in order to obtain relief, he prays for forgiveness. At the same time, he regrets, that by being taken out of the world, he would be deprived of an opportunity of praising God.

Commenting on Psalm 6:1-10

C.H. Spurgeon Reformed Baptist @princeofpreachers

"The Lord hath heard my supplication." The Holy Spirit had wrought into the Psalmist's mind the confidence that his prayer was heard. This is frequently the privilege of the saints. Praying the prayer of faith, they are often infallibly assured that they have prevailed with God.

Matthew Henry Presbyterian @wholebiblehenry

What a sudden change is here for the better! He that was groaning, and weeping, and giving up all for gone (Psa 6:6, Psa 6:7), here looks and speaks very pleasantly. Having made his requests known to God, and lodged his case with him, he is very confident the issue will be good and his sorrow is turned into joy. I.

Commenting on Psalm 6:8-10