Genesis 38:1-10

1At that time, Judah left his brothers and went down to stay with a man of Adullam named Hirah. 2There Judah met the daughter of a Canaanite man named Shua. He married her and made love to her; 3she became pregnant and gave birth to a son, who was named Er. 4She conceived again and gave birth to a son and named him Onan. 5She gave birth to still another son and named him Shelah. It was at Kezib that she gave birth to him. 6Judah got a wife for Er, his firstborn, and her name was Tamar. 7But Er, Judah’s firstborn, was wicked in the Lord’s sight; so the Lord put him to death. 8Then Judah said to Onan, “Sleep with your brother’s wife and fulfill your duty to her as a brother-in-law to raise up offspring for your brother.” 9But Onan knew that the child would not be his; so whenever he slept with his brother’s wife, he spilled his semen on the ground to keep from providing offspring for his brother. 10What he did was wicked in the Lord’s sight; so the Lord put him to death also.