In Genesis 38 , Judah , the fourth son of Jacob , mistook his daughter - in - law Tamar for a prostitute while she was veiled .
In Genesis 38 , Judah , the fourth son of Jacob , had sex with her .
In Genesis 38 , Judah , the fourth son of Jacob , mistook his daughter - in - law Tamar for a prostitute while she was veiled , and had sex with her .