Numbers 8:22-26 And afterwards the Levites came in to perform their service in the tent of meeting before Aaron, and before his sons; as Jehovah had commanded Moses concerning the Levites, so did they to them.

Darby⁽ⁱ⁾ ²² And afterwards the Levites came in to perform their service in the tent of meeting before Aaron, and before his sons; as Jehovah had commanded Moses concerning the Levites, so did they to them. ²³ And Jehovah spoke to Moses, saying, ²⁴ This is that which concerneth the Levites: from twenty-five years old and upward shall he come to labour in the work of the service of the tent of meeting. ²⁵ And from fifty years old he shall retire from the labour of the service, and shall serve no more; ²⁶ but he shall minister with his brethren in the tent of meeting, and keep the charge, but he shall not serve [in] the service. Thus shalt thou do unto the Levites with regard to their charges.