1 Corinthians 7:37-39

37 Nevertheless he that stands stedfast in his heart, having no necessity, but has power over his own will, and has so decreed in his heart that he will keep his virgin, does well.

38 So then he that gives [her] in marriage does well; but he that gives [her] not in marriage does better.

39 The wife is bound by the law as long as her husband lives; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord - Kurios.