The sons of Judah: Er, Onan, and Shelah. These three were born to him by Bath-shua the Canaanite. Er, Judah’s firstborn, was wicked in the sight of the LORD, who put him to death.
Jewish Publication Society of America Version (JPS1917) - 1 Chronicles 2:3 >The sons of Judah: Er, and Onan, and Shelah; which three were born unto him of Bath-shua the Canaanitess. And Er, Judah's first-born, was wicked in the sight of the LORD; and He slew him.