The wife is bound by the law as long as her husband lives; but if her husband is dead, she is at liberty to be married to whom she will; only in the Lord.
All Commentaries on 1 Corinthians 7:39 Go To 1 Corinthians 7
Cyprian of Carthage
AD 258
Also in the first Epistle of Paul to the Corinthians: "The woman is bound so long as her husband liveth; but if he die, she is freed to marry whom she will, only in the Lord. But she will be happier if she abide thus."