David
Psalm 50:4BSB·traditional attribution

He summons the heavens above, and the earth, that He may judge His people:

John Calvin Reformed @genevareformer

PSALM 50 There have always been hypocrites in the Church, men who have placed religion in a mere observance of outward ceremonies, and among the Jews there were many who turned their attention entirely to the figures of the Law, without regarding the truth which was represented under them. They conceived that nothing more was demanded of them but their sacrifices and other rites.

Commenting on Psalm 50:1-23

C.H. Spurgeon Reformed Baptist @princeofpreachers

He shall call to the heavens from above, and to the earth. Angels and men, the upper and the lower worlds, are called to witness the solemn scene. The whole creation shall stand in court to testify to the solemnity and the truth of the divine pleading.

Matthew Henry Presbyterian @wholebiblehenry

It is probable that Asaph was not only the chief musician, who was to put a tune to this psalm, but that he was himself the penman of it; for we read that in Hezekiah's time they praised God in the words of David and of Asaph the seer, Ch2 29:30. Here is, I.

Commenting on Psalm 50:1-6