Genesis 38:10

10 What he did was evil from ADONAI's perspective, so he killed him too.

Genesis 38:10 Meaning and Commentary

Genesis 38:10

And the thing which he did displeased the Lord
Being done out of envy to his brother, and through want of affection to the memory of his name; and it may be out of covetousness to get his estate into his own hands, and especially as it frustrated the end of such an usage of marrying a brother's wife; which appears to be according to the will of God, since it afterwards became a known law of his; and it was the more displeasing, as it was not only a check upon the multiplication of Abraham's seed as promised, but since the Messiah was to come from Judah. This was doing all to hinder it that lay in his power: wherefore he slew him also;
in like manner as he had slain his brother, ( Genesis 38:7 ) .

Genesis 38:10 In-Context

8 Y'hudah said to Onan, "Go and sleep with your brother's wife - perform the duty of a husband's brother to her, and preserve your brother's line of descent."

9 However, Onan knew that the child would not count as his; so whenever he had intercourse with his brother's wife, he spilled the semen on the ground, so as not to give his brother offspring.

10 What he did was evil from ADONAI's perspective, so he killed him too.

11 Then Y'hudah said to Tamar his daughter-in-law, "Stay a widow in your father's house until my son Shelah grows up"; for he thought, "I don't want him to die too, like his brothers." So Tamar went and lived at home with her father.

12 In due time, Shua's daughter, the wife of Y'hudah, died. After Y'hudah had been comforted, he went up to be with his sheep-shearers in Timnah, he and his friend Hirah the 'Adulami.