Then Judah said to Tamar his daughter-in-law, “Remain a widow in your father's house, till Shelah my son grows up”—for he feared that he would die, like his brothers. So Tamar went and dwelt in her father's house.
But Onan knew that the offspring would not be his; so when he went in to his brother's wife he spilled the semen on the ground, lest he should give offspring to his brother.
“If brothers dwell together, and one of them dies and has no son, the wife of the dead 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.
Turn back, my daughters, go your way, for I am too old to have a husband. If I should say I have hope, even if I should have a husband this night and should bear sons,