Romans 7:3
So then if, while her husband lives, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
Nave's Topical Index—AKJV

1 Corinthians 7:39
The wife is bound by the law as long as her husband lives; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
Nave's Topical Index—AKJV