God allowed them to marry, only directs that it be not to one of ill fame or divorced, Leviticus 21:13,14, nor the widow of any deceased common person; yet a priest might realty a priest's widow, but a virgin is rather commended to their choice; and whether widow or virgin, it must not be as Moses married a daughter of a strange people, or as they did in Babylon, Ezra 10:18, &c.; and possibly this of Ezekiel was designed as a rule to direct Ezra in reforming this disorder when they came from Babylon. Nor were they at liberty to marry any of any tribe, but it must be one of their own tribe too.
Related Commentaries of Ezekiel 44:22
Ezekiel 44:22
22 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.