Genesis 38:3

“And she conceived, and bare a son; and he called his name Er.”

Genesis 38:7

“And Er, Judah’s firstborn, was wicked in the sight of the Lord; and the Lord slew him.”

Genesis 46:12

“And the sons of Judah; Er, and Onan, and Shelah, and Pharez, and Zerah: but Er and Onan died in the land of Canaan. And ...”

Numbers 26:19

“The sons of Judah were Er and Onan: and Er and Onan died in the land of Canaan.”

1 Chronicles 2:3

“The sons of Judah; Er, and Onan, and Shelah: which three were born unto him of the daughter of Shua the Canaanitess. And...”