Genesis 38:4

She became pregnant again and had another son, whom she named Onan.

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

The descendants of Judah were Er and Onan, but Er and Onan died in the land of Canaan.

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And she conceived again, and bare a son; and she called his name Onan.

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

The descendants of Judah were Er and Onan, but Er and Onan died in the land of Canaan.