Bamidbar 8:23-25

Orthodox Jewish Bible

²³ And Hashem spoke unto Moshe, saying,

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;