Then said Judah to Tamar his daughter in law, Remain a widow in thy father's house, till Shelah my son be grown up: for he said, Lest he also die, like his brethren. And Tamar went and dwelt in her father's house.
And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother's wife, that he spilled it on the ground, lest he should give seed to his brother.
If brethren dwell together, and one of them die, and have no son, the wife of the dead shall not marry without unto a stranger: her husband's brother shall go in unto her, and take her to him to wife, and perform the duty of an husband's brother unto her.
Turn again, my daughters, go your way; for I am too old to have an husband. If I should say, I have hope, if I should even have an husband to-night, and should also bear sons;