Unto devils — So they did, not directly or intentionally, but by construction and consequence, because the devil is the author of idolatry, and is eminently served, and honoured by it. And as the Egyptians were notorious for their idolatry, so the Israelites were infected with their leaven, Joshua 24:14, Ezekiel 20:7, Ezekiel 23:2-3. A whoring — Idolatry, especially in God's people, is commonly called whoredom, because it is a violation of that covenant by which they were peculiarly betrothed or married to God.
Related Commentaries of Leviticus 17:7
Leviticus 17:7
7 And they shall no more offer their sacrifices unto devils, after whom they have gone a whoring. This shall be a statute for ever unto them throughout their generations.