Numbers 4:17-19

Darby Translation

¹⁷ And Jehovah spoke to Moses and to Aaron, saying,

¹⁸ Ye shall not cut off the families of the Kohathites from among the Levites,

¹⁹ but this shall ye do unto them, that they may live, and not die, when they draw near unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden;