7. And Er, Judah's firstborn, was wicked in the sight of the Lord, and the Lord slew him.
8. Then Judah told Onan, Marry your brother's widow; live with her and raise offspring for your brother.
9. But Onan knew that the family would not be his, so when he cohabited with his brother's widow, he prevented conception, lest he should raise up a child for his brother.
10. And the thing which he did displeased the Lord; therefore He slew him also.