Leviticus 21:14

14He must not marry a widow or a woman who has become separate from her husband. He must not marry a woman who has been a prostitute. Instead, he must choose a Levite woman who has not had sex before. 21:14 Levites belonged to the tribe of Levi, one of the 12 tribes of Israel. God chose the Levites to do special work for him in his temple. They helped the priests in the temple.