Numbers 18:5-7

5And ye shall keepH8104 the chargeH4931 of the sanctuaryH6944, and the chargeH4931 of the altarH4196; that there come no wrathH7110 any more upon the children of IsraelH3478.

6And I, behold, I have takenH3947 your brethren, the LevitesH3881, from among the children of IsraelH3478; to you are they givenH5414 as a giftH4979 for Jehovah to perform the serviceH5656 of the tentH168 of meetingH4150.

7But thou and thy sonsH1121 with thee shall attend to your priesthoodH3550 for all that concerneth the altarH4196, and for that which is inside the veil; and ye shall perform the serviceH5656: I giveH5414 you your priesthoodH3550 as a serviceH5656 of giftH4979, and the stranger that cometh near shall be putH5414 to deathH4191.