“When you buy the land from Naomi you also acquire Ruth the Moabite, Mahlon's widow, so you can marry her and have children with her to ensure the man's line continues,” Boaz explained.
They asked him, “Teacher, Moses said that if a married man dies without having children, his brother should marry his widow and have children on behalf of his brother.
“Teacher,” they began, “Moses gave us a law that if a married man dies leaving a wife without children, then his brother should marry the widow and have children for his dead brother.
However, if the man refuses to marry his brother's widow, she shall go to the elders at the town gate and tell them, “My husband's brother is refusing to keep his brother's name alive in Israel. He doesn't want to perform the requirements of a brother-in-law for me.”