David
Psalm 4:5BSB·traditional attribution

Offer the sacrifices of the righteous and trust in the LORD.

John Calvin Reformed @genevareformer

PSALM 4. After David in the beginning of the psalm has prayed to God to help him, he immediately turns his discourse to his enemies, and depending on the promise of God, triumphs over them as a conqueror. He, therefore, teaches us by his example, that as often as we are weighed down by adversity, or involved in very great distress, we ought to meditate...

Commenting on Psalm 4:1-8

C.H. Spurgeon Reformed Baptist @princeofpreachers

Provided that the rebels had obeyed the voice of the last verse, they would now be crying, —"What shall we do to be saved?" And in the present verse, they are pointed to the sacrifice, and exhorted to trust in the Lord.

Matthew Henry Presbyterian @wholebiblehenry

The title of the psalm acquaints us that David, having penned it by divine inspiration for the use of the church, delivered it to the chief musician, or master of the song, who (according to the divine appointment of psalmody made in his time, which he was chiefly instrumental in the establishment of) presided in that service.

Commenting on Psalm 4:1-5