1 Corinthians 7:2, 28, 36, 39

But because sexual sin is a danger, each man should have his own wife, and each woman should have her own husband.

But if you decide to marry, you have not sinned. And if a girl who has never married decides to marry, she has not sinned. But those who marry will have trouble in this life, and I want you to be free from trouble.

If a man thinks he is not doing the right thing with the girl he is engaged to, if she is almost past the best age to marry and he feels he should marry her, he should do what he wants. They should get married. It is no sin.

A woman must stay with her husband as long as he lives. But if her husband dies, she is free to marry any man she wants, but she must marry another believer.