Genesis 38:6

38:6 Judah acquired a wife for Er his firstborn; her name was Tamar.

Genesis 38:11

38:11 Then Judah said to his daughter-in-law Tamar, “Live as a widow in your father’s house until Shelah my son grows up.” For he thought, “I don’t want him to die like his brothers.” So Tamar went and lived in her father’s house.

Genesis 38:24-26

38:24 After three months Judah was told, “Your daughter-in-law Tamar has turned to prostitution, and as a result she has become pregnant.” Judah said, “Bring her out and let her be burned!” 38:25 While they were bringing her out, she sent word to her father-in-law: “I am pregnant by the man to whom these belong.” Then she said, “Identify the one to whom the seal, cord, and staff belong.” 38:26 Judah recognized them and said, “She is more upright than I am, because I wouldn’t give her to Shelah my son.” He did not have sexual relations with her again.