Charles Ellicott Commentary Deuteronomy 32:17

"They sacrificed unto demons, [which were] no God, To gods that they knew not, To new [gods] that came up of late, Which your fathers dreaded not." — Deuteronomy 32:17 (ASV)

They sacrificed unto devils, not to God. — Saint Paul repeats this expression in 1 Corinthians 11:20.

Gods that came newly up. — Literally, that came from close at hand. Compare the description of the idol in Isaiah 44:15, easily made from the firewood; and see also Wisdom 13:13, A carpenter taking a crooked piece of wood, and full of knots, hath carved it diligently, when he had nothing else to do — a comment on the passage in Isaiah 44.