Genesis 38:10

Genesis 38:10, in plain English

God sees that what Onan did is wicked, and the LORD puts him to death as well.

Why it's here

Now Tamar has lost two husbands. From her perspective, she's cursed. But the Bible is clear about what actually happened—Onan's selfishness was seen and judged by God. He refused to show mercy, so mercy was withheld from him.

Who's speaking

The narrator, with divine judgment

Where it sits in the story

Two sons down. Judah is now afraid. He has one son left, Shelah, and he's terrified of losing him too. This fear will lead him to break his own law and betray Tamar in the next verses.

The scholarly reading

The LORD judges Onan's refusal as wicked and puts him to death, just as He had done with Er, leaving Judah with only one son.

Language and setting

The phrase וַיִּשְׁמַר עַל־הַדָּרֶךְ (vayishmor al-hadderech, 'what he did was wicked') again uses the legal judgment formula. Onan's sin differs from Er's—it is not mysterious but transparent to the reader: he violated a sacred familial obligation. His death is the narrative consequence of willful refusal to uphold covenant duty. The doubling of deaths (Er and Onan) escalates the crisis and raises theological questions about whether Judah's entire line is cursed.

Voice

The omniscient narrator of Genesis

Significance

With two sons dead, Judah faces a genuine crisis: the levirate obligation remains unfulfilled, Tamar is trapped in limbo, and the covenant line appears threatened. Divine judgment has eliminated the 'natural' heirs, forcing the narrative toward an extraordinary resolution.

8Then Judah said to Onan, “Sleep with your brother’s wife. Perform your duty as her brother-in-law and raise up offspring for your brother.”

9But Onan knew that the offspring would not belong to him; so whenever he would sleep with his brother’s wife, he would spill his seed on the ground so that he would not produce offspring for his brother.

10What he did was wicked in the sight of the LORD, so He put Onan to death as well.

11Then Judah said to his daughter-in-law Tamar, “Live as a widow in your father’s house until my son Shelah grows up.” For he thought, “He may die too, like his brothers.” So Tamar went to live in her father’s house.

12After a long time Judah’s wife, the daughter of Shua, died. When Judah had finished mourning, he and his friend Hirah the Adullamite went up to his sheepshearers at Timnah.

Read all of Genesis 38 — A strange detour from Joseph's story. Judah's failures and Tamar's boldness both play a role in the ancestry of the Messiah.