Genesis 38:12-16

After some time passed, Judah’s wife, the daughter of Shua, died. When his time of mourning was over, he and his friend Hirah the Adullamite went to Timnah to enjoy the festivities at the sheep-shearing. Meanwhile, Tamar had learned that Shelah had grown up, but Judah had still not given him to her to father a child for her deceased husband. So, when Tamar found out her father-in-law was coming to Timnah for the sheep-shearing, she removed her widow’s clothes and covered herself with a veil to disguise herself. And she sat waiting at the crossroads where Judah would have to pass by. When Judah saw her, she was wearing a veil over her face, so he thought she was a prostitute. He had no clue that she was his own daughter-in-law. So he approached her and said, “Come sleep with me.” “What will you give me if I do?” she answered.