Albert Barnes Commentary Judges 3:7

"And the children of Israel did that which was evil in the sight of Jehovah, and forgat Jehovah their God, and served the Baalim and the Asheroth." — Judges 3:7 (ASV)

And the groves - literally, Asheroth, images of Asherah (the goddess companion of Baal): see Deuteronomy 16:21 note.