Hesabu 8 : 19 Numbers chapter 8 verse 19

Nami nimempa Haruni hao Walawi wawe kipawa chake yeye na wanawe, kutoka kwa wana wa Israeli, ili watumike utumishi wa wana wa Israeli katika hema ya kukutania, kisha wafanye upatanisho kwa ajili ya wana wa Israeli; ili kusiwe na maradhi kati ya wana wa Israeli, hapo wana wa Israeli watakapopakaribia mahali patakatifu.
soma Mlango wa 8

I have given the Levites as a gift to Aaron and to his sons from among the children of Israel, to do the service of the children of Israel in the Tent of Meeting, and to make atonement for the children of Israel; that there be no plague among the children of Israel, when the children of Israel come near to the sanctuary."