Genesis 38:8-9 ▼

8 And Judah says to Onan, “Go in to the wife of your brother, and marry her, and raise up seed to your brother”;

9 and Onan knows that the seed is not [reckoned] his; and it has come to pass, if he has gone in to his brother’s wife, that he has destroyed [it] to the earth, so as not to give seed to his brother;