Deu 25:5 | ESV | STEP | If brothers dwell together , and one of them dies and has no son , the wife of the dead man shall not be married outside the family to a stranger . Her husband’s brother shall go in to her and take her as his wife and perform the duty of a husband’s brother to her .

‏ Deuteronomy 25:5

Laws Concerning Levirate Marriage

5 ^a“If brothers dwell together, and one of them dies and has no son, the wife of the dead man shall not be married outside the family to a stranger. Her ^bhusband’s brother shall go in to her and take her as his wife and perform the duty of a husband’s brother to her.