NET
39 A wife is bound as long as her husband is living. But if her husband dies, she is free to marry anyone she wishes (only someone in the Lord).
Darby
39 A wife is bound for whatever time her husband lives; but if the husband be fallen asleep, she is free to be married to whom she will, only in [the] Lord.
KJV
39 The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.