Bamidbar 8:24-26

Orthodox Jewish Bible

²⁴ This is it that belongeth unto the Levi’im: from twenty and five years old and upward they shall enter to perform service in the Avodat Ohel Mo’ed;

²⁵ And from the age of fifty years they shall retire from the service of the Avodah and shall serve no more;

²⁶ But shall assist with their brethren in the Ohel Mo’ed, in performing their duties, and shall do no Avodah. Thus shalt thou do with the Levi’im regarding their duties.