Numbers 26:19

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

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 the sons of Pharez were Hezron and Hamul.

Genesis 38:1-10

And it came to pass at that time, that Judah went down from his brethren, and turned in to a certain Adullamite, whose name was Hirah.

1 Chronicles 2:3-8

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.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

Er and onan

Genesis 38:1
And it came to pass at that time, that Judah went down from his brethren, and turned in to a certain Adullamite, whose name was Hirah.
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 the sons of Pharez were Hezron and Hamul.
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 Er, the firstborn of Judah, was evil in the sight of the LORD; and he slew him.

General references

Numbers 1:26
Of the children of Judah, by their generations, after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, all that were able to go forth to war;

King James Version Public Domain