Genesis 38:13-16

13And it was told Tamar, saying, Behold, thy father-in-law goeth up to Timnah to shear his sheep. 14And she put off from her the garments of her widowhood, and covered herself with her veil, and wrapped herself, and sat in the gate of Enaim, which is by the way to Timnah; for she saw that Shelah was grown up, and she was not given unto him to wife. 15When Judah saw her, he thought her to be a harlot; for she had covered her face. 16And he turned unto her by the way, and said, Come, I pray thee, let me come in unto thee: for he knew not that she was his daughter-in-law. And she said, What wilt thou give me, that thou mayest come in unto me?