Genesis 38:4

1At that time, Judah went down from his brothers, and visited a certain Adullamite, whose name was Hirah.

2There, Judah saw the daughter of a certain Canaanite man named Shua. He took her, and went in to her.

3She conceived, and bore a son; and he named him Er.

4She conceived again, and bore a son; and she named him Onan.

5She yet again bore a son, and named him Shelah. He was at Chezib when she bore him.

6Judah took a wife for Er, his firstborn, and her name was Tamar.

7Er, Judah’s firstborn, was wicked in the LORD’s sight. So the LORD killed him.

8Judah said to Onan, “Go in to your brother’s wife, and perform the duty of a husband’s brother to her, and raise up offspring for your brother.”