Genesis 35:2-4

Then Jacob said unto his household, and to all that were with him, Put away the strange gods that are among you, and be clean, and change your garments: and let us arise, and go up to Beth-el; and I will make there an altar unto God, who answered me in the day of my distress, and was with me in the way which I went. 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.