New Revised Standard Version
But since Onan knew that the offspring would not be his, he spilled his semen on the ground whenever he went in to his brother’s wife, so that he would not give offspring to his brother.

Contemporary English Version
Onan knew the child would not be his, and when he had sex with Tamar, he made sure that she would not get pregnant.

New American Bible
Onan, however, knew that the offspring would not be his; so whenever he had intercourse with his brother’s wife, he wasted his seed on the ground, to avoid giving offspring to his brother.

Douay-Rheims Bible
He knowing that the children should not be his, when he went in to his brother's wife, he spilled his seed upon the ground, lest children should be born in his brother's name.

He knowing that the children should not be his, when he went in to his brother's wife, he spilled his seed upon the ground, lest children should be born in his brother's name.

he is.

Deuteronomy 25:6 And the first son he shall have of her he shall call by his name, that his name be not abolished out of Israel.

Ruth 1:11 But she answered them: Return, my daughters: why come ye with me? have I any more sons in my womb, that you may hope for husbands of me?

Ruth 4:10 And have taken to wife Ruth, the Moabitess, the wife of Mahalon, to raise up the name of the deceased in his inheritance lest his name be cut off, from among his family and his brethren and his people. You, I say, are witnesses of this thing.

lest that.

Job 5:2 Anger indeed killeth the foolish, and envy slayeth the little one.

Proverbs 27:4 Anger hath no mercy: nor fury, when it breaketh forth: and who can bear the violence of one provoked?

Titus 3:3 For we ourselves also were some time unwise, incredulous, erring, slaves to divers desires and pleasures, living in malice and envy, hateful and hating one another.

James 3:14,16 But if you have bitter zeal, and there be contention in your hearts: glory not and be not liars against the truth. . . .

James 4:5 Or do you think that the scripture saith in vain: To envy doth the spirit covet which dwelleth in you?