Deuteronomy 25:5
If brothers dwell together, and one of them die, and have no child, the wife of the dead shall not marry without to a stranger: her husband's brother shall go in to her, and take her to him to wife, and perform the duty of an husband's brother to her.
Torrey's Topical Textbook—AKJV

Matthew 22:24
Saying, Master, Moses said, If a man die, having no children, his brother shall marry his wife, and raise up seed to his brother.
Torrey's Topical Textbook—AKJV