Genesis 38:8-10

Common English Bible

⁸ Judah said to Onan, “Go to your brother’s wife, do your duty as her brother-in-law, and provide children for your brother.” ⁹ Onan knew the children wouldn’t be his so when he slept with his brother’s wife, he wasted his semen on the ground, so he wouldn’t give his brother children. ¹⁰ The Lord considered what he did as wrong and put him to death too.