Genesis 38:9NET Bible
But Onan knew that the child would not be considered his. So whenever he had sexual relations with his brother's wife, he withdrew prematurely so as not to give his brother a descendant.
Related Verses
Genesis 3:7
Then the eyes of both of them opened, and they knew they were naked; so they sewed fig leaves together and made coverings for themselves.
Genesis 3:16
To the woman he said, "I will greatly increase your labor pains; with pain you will give birth to children. You will want to control your husband, but he will dominate you."
Genesis 4:25
And Adam had marital relations with his wife again, and she gave birth to a son. She named him Seth, saying, "God has given me another child in place of Abel because Cain killed him."
Genesis 6:4
The Nephilim were on the earth in those days (and also after this) when the sons of God were having sexual relations with the daughters of humankind, who gave birth to their children. They were the mighty heroes of old, the famous men.
Genesis 8:11
When the dove returned to him in the evening, there was a freshly plucked olive leaf in its beak! Noah knew that the waters had receded from the earth.