They must not marry widows or divorced women; they may marry only virgins of Israelite descent or widows of priests. (NIV)
Neither shall they take for their wives a widow or a woman separated or divorced from her husband; but they shall marry maidens [who are virgins] of the offspring of the house of Israel or a widow previously married to a priest. (AMP)
Neither shall they take for their wives a widow, nor her that is put away: but they shall take maidens of the seed of the house of Israel, or a widow that had a priest before. (KJV)