Genesis 38:8-10

Revised Geneva Translation

⁸ And Judah said to Onan, “Go into your brother’s wife and do the office of a kinsman to her; and raise up seed to your brother.”

⁹ And Onan knew that the seed would not be his. Therefore, when he went in to his brother’s wife, he spilled it on the ground, lest he should give seed to his brother.

¹⁰ And it was wicked in the eyes of the LORD, that which he did. Therefore He killed him also.