Genesis 38:6–10

And Judah took a wife for Er his firstborn, and her name was Tamar. But Er, Judah’s firstborn, was wicked in the sight of the Lord, and the Lord put him to death. Then Judah said to Onan, “Go in to your brother’s wife and perform the duty of a brother-in-law to her, and raise up offspring for your brother.” But Onan knew that the offspring would not be his. So whenever he went in to his brother’s wife he would waste the semen on the ground, so as not to give offspring to his brother. And what he did was wicked in the sight of the Lord, and he put him to death also.

Judah got a wife for Er, his firstborn, and her name was Tamar. But Er, Judah’s firstborn, was wicked in the Lord’s sight; so the Lord put him to death.

Then Judah said to Onan, “Sleep with your brother’s wife and fulfill your duty to her as a brother-in-law to raise up offspring for your brother.” But Onan knew that the child would not be his; so whenever he slept with his brother’s wife, he spilled his semen on the ground to keep from providing offspring for his brother. What he did was wicked in the Lord’s sight; so the Lord put him to death also.

Judah got a wife for Er, his firstborn, and her name was Tamar. Now Er, Judah’s firstborn, was evil in the Lord’s sight, and the Lord put him to death. Then Judah said to Onan, “Sleep with your brother’s wife. Perform your duty as her brother-in-law and produce offspring for your brother.” But Onan knew that the offspring would not be his, so whenever he slept with his brother’s wife, he released his semen on the ground so that he would not produce offspring for his brother. What he did was evil in the Lord’s sight, so he put him to death also.

In the course of time, Judah arranged for his firstborn son, Er, to marry a young woman named Tamar. But Er was a wicked man in the Lord’s sight, so the Lord took his life. Then Judah said to Er’s brother Onan, “Go and marry Tamar, as our law requires of the brother of a man who has died. You must produce an heir for your brother.”

But Onan was not willing to have a child who would not be his own heir. So whenever he had intercourse with his brother’s wife, he spilled the semen on the ground. This prevented her from having a child who would belong to his brother. But the Lord considered it evil for Onan to deny a child to his dead brother. So the Lord took Onan’s life, too.

And Judah took a wife for Er his firstborn, and her name was Tamar. And Er, the firstborn of Judah, was evil in the eyes of Yahweh, and Yahweh killed him. Then Judah said to Onan, “Go in to the wife of your brother and perform the duty of a brother-in-law to her, and raise up offspring for your brother.” But Onan knew that the offspring would not be for him, so whenever he went in to the wife of his brother he would waste it on the ground so as not to give offspring to his brother. And what he did was evil in the sight of Yahweh, so he killed him also.

And Judah took a wife for Er his firstborn, whose name was Tamar. And Er, Judah’s firstborn, was wicked in the sight of the Lord; and the Lord slew him. And Judah said unto Onan, Go in unto thy brother’s wife, and marry her, and raise up seed to thy brother. And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother’s wife, that he spilled it on the ground, lest that he should give seed to his brother. And the thing which he did displeased the Lord: wherefore he slew him also.