Genesis 38:14-15

14So she removed her widow’s clothes and covered herself with a veil, and wrapped herself up [in disguise], and sat in the gateway of Enaim, which is on the road to Timnah; for she saw that Shelah had grown up, and she had not been given to him as a wife [as Judah had promised].

15When Judah saw her, he thought she was a [temple] prostitute, for she had covered her face [as such women did].