Genesis 38:7-15

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.

11Judah then said to his daughter-in-law Tamar, “Live as a widow in your father’s household until my son Shelah grows up.” For he thought, “He may die too, just like his brothers.” So Tamar went to live in her father’s household.

12After a long time Judah’s wife, the daughter of Shua, died. When Judah had recovered from his grief, he went up to Timnah, to the men who were shearing his sheep, and his friend Hirah the Adullamite went with him. 13When Tamar was told, “Your father-in-law is on his way to Timnah to shear his sheep,”

14she took off her widow’s clothes, covered herself with a veil to disguise herself, and then sat down at the entrance to Enaim, which is on the road to Timnah. For she saw that, though Shelah had now grown up, she had not been given to him as his wife. 15When Judah saw her, he thought she was a prostitute, for she had covered her face.