Numbers 26:19 in the World English Bible
The sons of Judah: Er and Onan. Er and Onan died in the land of Canaan.
Context
18 These are the families of the children of Gad according to those that were numbered of them, forty thousand and five hundred.
19 The sons of Judah were Er and Onan: and Er and Onan died in the land of Canaan.
20 And the sons of Judah after their families were; of Shelah, the family of the Shelanites: of Pharez, the family of the Pharzites: of Zerah, the family of the Zarhites.