The text says that the dead whom he killed at his death were more than those whom he had killed during his life.
This is not some vindication of Samson. It is actually a tragic note. To be sure, his last achievement was his greatest, even if it was out of revenge; it was the destruction of people, lords, and god Dagon.1 But, this man who wasted his life, his high calling and extraordinary gifts, did more for God in death than in life—and not even because of Samson himself but because of the Lord.2 The Lord answers Samson’s prayer with a view to vindicating and avenging all the dishonour and shame that Samson brought upon the name of his Lord. Deity vindicates himself!
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30 And Samson said, “Let me die with the Philistines.” Then he bowed with all his strength, and the house fell upon the lords and upon all the people who were in it. So the dead whom he killed at his death were more than those whom he had killed during his life.