Moses
Leviticus 19:3ESV·traditional attribution

Every one of you shall revere his mother and his father, and you shall keep my Sabbaths: I am the LORD your God.

John Calvin Reformed @genevareformer

Since this passage unquestionably relates to the explanation of the Fifth Commandment, it confirms what I have before shown, that the honor which God-commands to be paid to parents, does not consist in reverence only, but also embraces obedience. For the reverence which He now prescribes will render children submissive and compliant.

Matthew Henry Presbyterian @wholebiblehenry

Moses is ordered to deliver the summary of the laws to all the congregation of the children of Israel (Lev 19:2); not to Aaron and his sons only, but to all the people, for they were all concerned to know their duty. Even in the darker ages of the law, that religion could not be of God which boasted of ignorance as its mother.

Commenting on Leviticus 19:1-10

John Gill Reformed Baptist @doctorgill

Ye shall fear every man his mother and his father,.... This has respect to the fifth command, which is the first with promise, and is here referred to first, because a man has his beginning in the world from his parents, and by them he is trained up in the observance of all the other laws of God, equally to be respected; and the fear...