Genesis 38:10

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

7 But Er, Judah’s firstborn, was wicked in the sight of the LORD; so the LORD put him to death.

8 Then Judah said to Onan, “Sleep with your brother’s wife. Perform your duty as her brother-in-law and raise up offspring for your brother.”

9 But Onan knew that the offspring would not belong to him; so whenever he would sleep with his brother’s wife, he would spill his seed on the ground so that he would not produce offspring for his brother.

10 What he did was wicked in the sight of the LORD, so He put Onan to death as well.

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

12 After a long time Judah’s wife, the daughter of Shua, died. When Judah had finished mourning, he and his friend Hirah the Adullamite went up to his sheepshearers at Timnah.

13 When Tamar was told, “Your father-in-law is going up to Timnah to shear his sheep,”

14 she removed her widow’s garments, covered her face with a veil to disguise herself, and sat at the entrance to Enaim, which is on the way to Timnah. For she saw that although Shelah had grown up, she had not been given to him as a wife.

Read all of Genesis 38