10 To the married I give this command (not I, but the Lord): A wife must not separate from her husband. 11But if she does, she must remain unmarried or else be reconciled to her husband. And a husband must not divorce his wife.
39 A woman is bound to her husband as long as he lives. But if her husband dies, she is free to marry anyone she wishes, but he must belong to the Lord.
Paul speaks on marriage in 1 Corinthians 7. He offers advice for single people, married people, divorced people, and widows. In these verses he is simply repeating the teaching of Jesus concerning divorce.
A person should not seek a divorce. If they do get divorced, they are to remain unmarried or else return to their spouse.
Marriage is a lifetime commitment. However when a spouse passes away, that commitment is broken and a person is free to remarry. Remarrying after a spouse’s death is not a break of the marriage covenant.
Other passages concerning divorce