Bereshis 38:10

10 And the thing which he did was rah in the eyes of Hashem; therefore He slaughtered him also.

Bereshis 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 ) .

Bereshis 38:10 In-Context

8 And Yehudah said unto Onan, Go in unto eshet achicha, and enter into levirate marriage with her, and raise up zera to achicha.

9 And Onan knew that the zera should not be his; and it came to pass, when he went in unto eshet achiv, that he spilled it on the ground, lest he should give zera to achiv.

10 And the thing which he did was rah in the eyes of Hashem; therefore He slaughtered him also.

11 Then said Yehudah to Tamar his kallah, Remain an almanah at thy bais avi, till Shelah beni is grown; for he said, Lest he die also, as his achim did. And Tamar went and dwelt in her bais avi.

12 And in process of time the bat Shua, eshet Yehudah, died; and Yehudah was consoled, and went up unto his sheepshearers to Timnah, he and his re’a Chirah the Adulami.