Genesis 35:2

Put away the strange gods - elohey hannechar , the gods of the foreigners, which were among them. Jacob' s servants were all Syrians, and no doubt were addicted less or more to idolatry and superstition. These gods might belong to them, or, as some have conjectured, they were the teraphim which Rachel stole; but these have already been supposed to be astrological tables, or something of this kind, called by Laban his gods, because by them he supposed he could predict future events, and that they referred to certain astral and planetary intelligences, by whose influences sublunary things were regulated. But it is more natural to suppose that these gods found now in Jacob' s family were images of silver, gold, or curious workmanship, which were found among the spoils of the city of Shechem. Lest these should become incitements to idolatry, Jacob orders them to be put away.

Be clean, and change your garments - Personal or outward purification, as emblematical of the sanctification of the soul, has been in use among all the true worshippers of God from the beginning of the world. In many cases the law of Moses more solemnly enjoined rites and ceremonies which had been in use from the earliest ages. "A Hindoo considers those clothes defiled in which he has been employed in business, and always changes them before eating and worship." - Ward.