Genesis 38:2-5

38:2 There Judah saw the daughter of a Canaanite man named Shua. Judah acquired her as a wife and had marital relations with her. 38:3 She became pregnant and had a son. Judah named him Er. 38:4 She became pregnant again and had another son, whom she named Onan. 38:5 Then she had yet another son, whom she named Shelah. She gave birth to him in Kezib.