Genesis 38:1-4

Judah and Tamar 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.