Numbers 26:19

The sons of Judah, Er and Onan; and Er will die, and Onan, in the land of Canaan.

Genesis 46:12

And the sons of Judah: Er and Onan and Shelah and Pharez and Zarah; and Er will die, and Onan in the land of Canaan. And the sons of Pharez will be Hezron and Hamu.

Genesis 38:1-10

And it shall be in that time, and Judah will go down from his brethren, and will turn to a man, an Adullamite, and his name Hirah.

1 Chronicles 2:3-8

The sons of Judah: Er and Onan, and Shelah: three were born to him from the daughter of Shua the Canaanitess. And Er the first-born of Judah will be evil in the eyes of Jehovah; and he will slay 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 shall be in that time, and Judah will go down from his brethren, and will turn to a man, an Adullamite, and his name Hirah.
Genesis 46:12
And the sons of Judah: Er and Onan and Shelah and Pharez and Zarah; and Er will die, and Onan in the land of Canaan. And the sons of Pharez will be Hezron and Hamu.
1 Chronicles 2:3
The sons of Judah: Er and Onan, and Shelah: three were born to him from the daughter of Shua the Canaanitess. And Er the first-born of Judah will be evil in the eyes of Jehovah; and he will slay him.

General references

Numbers 1:26
And for the sons of Judah, their generations according to their families, according to the house of their fathers, according to the number of names, from the son of twenty years and above, all going forth to war.