Genesis 38:3
Shua bore him a son, whom he named Er.
Genesis 46:12
The sons of Judah were Er, Onan, Shelah, Perez, and Zerah. (Er and Onan died in Canaan.) The sons of Perez were Hezron and Hamul.
Numbers 26:19
Er and Onan were sons of Judah, but they died in Canaan.
Treasury of Scripture Knowledge
Summary
And she conceived, and bare a son; and he called his name Er.
Bible References
Er
Genesis 46:12
The sons of Judah were Er, Onan, Shelah, Perez, and Zerah. (Er and Onan died in Canaan.) The sons of Perez were Hezron and Hamul.
Numbers 26:19
Er and Onan were sons of Judah, but they died in Canaan.