Hesabu 8 : 11 Numbers chapter 8 verse 11

naye Haruni atawasongeza Walawi mbele za Bwana wawe sadaka ya kutikiswa, kwa ajili ya wana wa Israeli, ili wawe wenye kufanya utumishi wa Bwana.
soma Mlango wa 8

and Aaron shall offer the Levites before Yahweh for a wave offering, on the behalf of the children of Israel, that it may be theirs to do the service of Yahweh.