Genesis 35:4

Overview - Genesis 35
God commands Jacob to go to Bethel.
He purges his house of idols.
He builds an altar at Bethel.
Deborah dies at Allon-bachuth.
God blesses Jacob at Bethel.
16 Rachel travails of Benjamin, and dies in the way to Edar.
22 Reuben lies with Bilhah.
23 The sons of Jacob.
27 Jacob comes to Isaac at Hebron.
28 The age, death, and burial of Isaac.
Treasury of Scripture Knowledge

Genesis 35:4  (King James Version)
And they gave unto Jacob all the strange gods which were in their hand, and all their earrings which were in their ears; and Jacob hid them under the oak which was by Shechem.

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 ; 30:22

the oak
Joshua 24:25 Joshua 24:26 ; Judges 9:6