Genesis 38:8-10

New King James Version

⁸ And Judah said to Onan, “Go in to ^(A)your brother’s wife and marry her, and raise up an heir to your brother.” ⁹ But Onan knew that the heir would not be ^(B)his; and it came to pass, when he went in to his brother’s wife, that he emitted on the ground, lest he should give an heir to his brother. ¹⁰ And the thing which he did ^[a]displeased the Lord; therefore He killed ^(C)him also.