A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behavior, given to hospitality, apt to teach;
All Commentaries on 1 Timothy 3:2 Go To 1 Timothy 3
The Apostolic Constitutions
AD 375
Such a one a bishop ought to be, who has been the "husband of one wife".
We have already said, that a bishop, a presbyter, and a deacon, when they are constituted, must be but once married, whether their wives be alive or whether they be dead; and that it is not lawful for them, if they are unmarried when they are ordained, to be married afterwards; or if they be then married, to marry a second time, but to be content with that wife. which they had when they came to ordination.