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. (NIV)
A wife is bound to her husband by law as long as he lives. If the husband dies, she is free to be married to whom she will, only [provided that he too is] in the Lord. (AMP)
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. (KJV)