Numbers 3:9-10

LXX2012(i) 9 And you shall give the Levites to Aaron, and to his sons the priests; they are given for a gift to me of the children of Israel. 10 And you shall appoint Aaron and his sons over the tabernacle of witness; and they shall keep their charge of priesthood, and all things belonging to the altar, and within the veil; and the stranger that touches them shall die.