Genesis 38:14-15

So she took off the clothes that showed she was a widow and covered her face with a veil to hide who she was. Then she sat down by the gate of Enaim on the road to Timnah. She did this because Judah’s younger son Shelah had grown up, but Judah had not made plans for her to marry him. When Judah saw her, he thought she was a prostitute, because she had covered her face with a veil.