Genesis 38:10

10 And his doing this appeared evil before God; and he slew him also.

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 And Judas said to Aunan, Go in to thy brother's wife, and marry her as her brother-in-law, and raise up seed to thy brother.
9 And Aunan, knowing that the seed should not be his—it came to pass when he went in to his brother's wife, that he spilled upon the ground, so that he should not give seed to his brother's wife.
10 And his doing this appeared evil before God; and he slew him also.
11 And Judas said to Thamar, his daughter-in-law, Sit thou a widow in the house of thy father-in-law, until Selom my son be grown; for he said, lest he also die as his brethren; and Thamar departed, and sat in the house of her father.
12 And the days were fulfilled, and Sava the wife of Judas died; and Judas, being comforted, went to them that sheared his sheep, himself and Iras his Shepherd the Odollamite, to Thamna.

The Brenton translation of the Septuagint is in the public domain.