Moses
Leviticus 19:4ESV·traditional attribution

Do not turn to idols or make for yourselves any gods of cast metal: I am the LORD your God.

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

Turn ye not unto idols,.... From the one only true and living God to them that are not gods, as the word used signifies, who are nothing; for, as the apostle says, an idol is nothing in the world, Co1 8:4, is of no worth and value, of no consequence and importance, of no avail and usefulness to its devotees; wherefore to turn from the...

Adam Clarke Methodist @methodicalclarke

Turn ye not unto idols - אלילם elilim, literally nothings; and to this St. Paul seems to allude Co1 8:4, where he says, We know that an idol is Nothing in the world.