'Father in law' in the Bible

And his daughter-in-law, the wife of Phinehas, was with child and near the time when she would give birth; and when she had the news that the ark of God had been taken and that her father-in-law and her husband were dead, her pains came on her suddenly and she gave birth.

And she gave the child the name of Ichabod, saying, The glory has gone from Israel: because the ark of God was taken and because of her father-in-law and her husband.