'Father in law' in the Bible

And his daughter-in-law, Phinehas' wife, was with child, ready to be delivered. And when she heard the report that the ark of God was taken, and that her father-in-law and her husband were dead, she bowed herself and travailed, for her pains came upon her.

And she named the child Ichabod, saying, The glory has departed from Israel, because the ark of God had been taken, and because of her father-in-law and her husband.