Genesis 38:4; Genesis 38:8; Genesis 38:9; Genesis 46:12

Genesis 38:4

4 Then she conceived again and bore a son and named him Onan.

Genesis 38:8

8 Then Judah said to Onan, "Go in to your brother's wife, and perform your duty as a brother-in-law to her, and raise up offspring for your brother."

Genesis 38:9

9 Onan knew that the offspring would not be his; so when he went in to his brother's wife, he wasted his seed on the ground in order not to give offspring to his brother.

Genesis 46:12

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