earrings: These rings were not worn as mere ornaments, but for superstitious purposes; perhaps as amulets or charms, first consecrated to some false god, or formed under some constellation, and stamped with magical characters. Maimonides mentions rings and jewels of this kind, with the image of the sun, moon, etc., impressed upon them; and Augustine describes them (Epist. 73), as used for this execrable purpose. Exodus 32:2-4; Judges 8:24-27; Hosea 2:13
hid them: Exodus 32:20; Deuteronomy 7:5, Deuteronomy 7:25; Isaiah 2:20, Isaiah 30:22
the oak: Joshua 24:25-26; Judges 9:6