Ezekiel 44:21-23

Amplified Bible

²¹ Nor shall any priest drink wine when he enters the inner courtyard. ²² And they shall not marry a widow or a divorced woman; but they shall marry virgins of the descendants of the house of Israel, or a widow who was previously married to a priest. ²³ The priests shall teach My people the difference between the holy and the common, and teach them to distinguish between the (ceremonially) unclean and the clean.