Numbers 8:24-26

Darby Translation

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.