The Bible

 

Genesis 38:4

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4 And again she gave birth to a son, and he gave him the name Onan.

The Bible

 

Genesis 46:12

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12 And the sons of Judah: Er and Onan and Shelah and Perez and Zerah: but Er and Onan had come to their death in the land of Canaan; and the sons of Perez were Hezron and Hamul.