Genesis 38:13-16

13Then Tamar was told, “Look! Your father-in-law is going up to Timnah to shear his flocks.”

14And she removed her widow’s clothes from herself, covered herself with a veil, wrapped herself, and sat by the entrance to the springs on the way to Timnah (for she saw that Shelah had grown up and 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.

16So he turned aside to her along the way and said, “Please let me sleep with you” (for he did not know that she was his daughter-in-law). “What,” she asked, “will you give me to sleep with me?”