Numbers 4:18 KJV
Cut ye not off the tribe of the families of the Kohathites from among the Levites:
Numbers 4:18, King James Version
In context
17 And the Lord spake unto Moses and unto Aaron, saying,
18 Cut ye not off the tribe of the families of the Kohathites from among the Levites:
19 But thus do unto them, that they may live, and not die, when they approach unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden: