saying, “Teacher, Moses wrote for us, ‘If someone’s brother dies, leaving a wife but no child, his brother must take the wife and raise up descendants for his brother.’
Then Judah said to Onan, “Have intercourse with your brother’s wife, in fulfillment of your duty as brother-in-law, and thus preserve your brother’s line.”
Boaz continued, “When you acquire the field from Naomi, you also acquire responsibility for Ruth the Moabite, the widow of the late heir, to raise up a family for the deceased on his estate.”