And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard it. Now the sons of Jacob were twelve:
The sons of Judah; Er, and Onan, and Shelah: which three were born unto him of the daughter of Shu´a the Canaanitess. And Er, the firstborn of Judah, was evil in the sight of the Lord; and he slew him.