Genesis 38:13-16

13When Tamar was told, “Your father-in-law is going up to Timnah to shear his sheep,” 14she 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.

15When Judah saw her, he thought she was a prostitute because she had covered her face. 16Not realizing that she was his daughter-in-law, he went over to her and said, “Come now, let me sleep with you.”

“What will you give me for sleeping with you?” she inquired.