Tertullian

“ For which reason he “wills” them to “marry,” for fear of their subsequently rescinding the first faith of professed widowhood; not to sanction their marrying as often as ever they may refuse to persevere in a widowhood plied with temptation—nay, rather, spent in indulgence. ”

“ We read him withal writing to the Romans: ‘But the woman who is under an husband, is bound to her husband (while) living; but if he shall have died, she has been emancipated from the law of the husband.’ Doubtless, then, the husband living, she will be thought to commit adultery if she shall have been joined to a second husband. ”