Deuteronomy 10:8-11

10:8 At that time the Lord set apart the tribe of Levi to carry the ark of the Lord’s covenant, to stand before the Lord to serve him, and to formulate blessings in his name, as they do to this very day. 10:9 Therefore Levi has no allotment or inheritance among his brothers; the Lord is his inheritance just as the Lord your God told him. 10:10 As for me, I stayed at the mountain as I did the first time, forty days and nights. The Lord listened to me that time as well and decided not to destroy you. 10:11 Then he said to me, “Get up, set out leading the people so they may go and possess the land I promised to give to their ancestors.”