And Judah said unto Onan, Go in unto thy brother's wife, and perform the duty of a husband's brother unto her, and raise up seed to thy brother.
If brethren dwell together, and one of them die, and have no son, the wife of the dead shall not be married 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 a husband's brother unto her.
And it shall be, that the first-born that she beareth shall succeed in the name of his brother that is dead, that his name be not blotted out of Israel.
And Naomi said, Turn again, my daughters: why will ye go with me? have I yet sons in my womb, that they may be your husbands?
Turn again, my daughters, go your way; for I am too old to have a husband. If I should say, I have hope, if I should even have a husband to-night, and should also bear sons;