1 Chronicles 2:3

The sons of Judah: Er, Onan and Shelah; [these] three were born to him from Bathshua the Canaanite. Now Er, Judah's firstborn, [was] evil in the sight of Yahweh, and he put him to death.

Genesis 38:2-10

And Judah saw the daughter of a certain Canaanite there whose name [was] Shua. And he took her and went in to her.

Genesis 46:12

The sons of Judah: Er, Onan, Shelah, Perez, and Zerah (but Er and Onan died in the land of Canaan). And the sons of Perez were Hezron and Hamul.

Numbers 26:19

The sons of Judah: Er and Onan; but Er and Onan died in the land of Canaan.

1 Chronicles 9:5

And from the Shilonites: Asaiah the firstborn and his sons.

Treasury of Scripture Knowledge

Summary

The sons of Judah; Er, and Onan, and Shelah: which three were born unto him of the daughter of Shua the Canaanitess. And Er, the firstborn of Judah, was evil in the sight of the LORD; and he slew him.

Bible References

Er, and

1 Chronicles 9:5
And from the Shilonites: Asaiah the firstborn and his sons.
Genesis 38:2
And Judah saw the daughter of a certain Canaanite there whose name [was] Shua. And he took her and went in to her.
Genesis 46:12
The sons of Judah: Er, Onan, Shelah, Perez, and Zerah (but Er and Onan died in the land of Canaan). And the sons of Perez were Hezron and Hamul.
Numbers 26:19
The sons of Judah: Er and Onan; but Er and Onan died in the land of Canaan.