Cross References → Genesis 38:9

But 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.

the offspring would not belong to him

Deuteronomy 25:6
The first son she bears will carry on the name of the dead brother, so that his name will not be blotted out from Israel.
Ruth 1:11
But Naomi replied, “Return home, my daughters. Why would you go with me? Are there still sons in my womb to become your husbands?
Ruth 4:10
Moreover, I have acquired Ruth the Moabitess, Mahlon’s widow, as my wife, to raise up the name of the deceased through his inheritance, so that his name will not disappear from among his brothers or from the gate of his home. You are witnesses today.”

so that he would not produce offspring for his brother

Job 5:2
For resentment kills a fool, and envy slays the simple.
Proverbs 27:4
Wrath is cruel and anger is like a flood, but who can withstand jealousy?
Titus 3:3
For at one time we too were foolish, disobedient, misled, and enslaved to all sorts of desires and pleasures—living in malice and envy, being hated and hating one another.
James 3:14,16
But if you harbor bitter jealousy and selfish ambition in your hearts, do not boast in it or deny the truth. ... For where jealousy and selfish ambition exist, there will be disorder and every evil practice.
James 4:5
Or do you think the Scripture says without reason that the Spirit He caused to dwell in us yearns with envy?