A wife is bound by law as long as her husband lives; but if her husband dies, she is at liberty to be married to whom she wishes, only in the Lord.
1 Corinthians 7:39
Surrounding context
7:38 So then he who gives her in marriage does well, but he who does not give her in marriage does better.
7:39 A wife is bound by law as long as her husband lives; but if her husband dies, she is at liberty to be married to whom she wishes, only in the Lord.
7:40 But she is happier if she remains as she is, according to my judgment--and I think I also have the Spirit of God.