Bamidbar 18:1-2

Orthodox Jewish Bible

18 And Hashem said unto Aharon, Thou and thy Banim and thy Bais Av with thee shall bear the avon (guilt) of the Mikdash; and thou and thy Banim with thee shall bear the avon of the kehunah of you [see Ya 3:1].

² And thy brethren also of the tribe of Levi, the Shevet Avicha, bring thou with thee, that they may be joined unto thee, and minister unto thee; while thou and thy Banim with thee are before the Ohel HaEdut.