Genesis 38:2-10

2Judah saw there a daughter of a certain Canaanite whose name was 1Shua; and he took her as a wife and had relations with her. 3And she conceived and gave birth to a son, and he named him 2Er. 4Then she conceived again and gave birth to a son, and she named him 3Onan. 5She gave birth to yet another son and named him 4Shelah; and it was at Chezib 5that she gave birth to him.

6Now Judah took a wife for Er his firstborn, and her name was Tamar. 7But 6Er, Judah’s firstborn, was evil in the sight of the Lord, so the Lord took his life. 8Then Judah said to Onan, “7Have relations with your brother’s wife and perform your duty as a brother-in-law to her, and raise up a 8child for your brother.” 9Now Onan knew that the 910child would not be his; so when he had relations with his brother’s wife, he 11wasted his seed on the ground so that he would not give 12a child to his brother. 10But what he did was displeasing in the sight of the Lord; so He 13took his life also.