According to the Book of Judges, Samson killed more people at his death than he had killed during his life.
Samson was an Israelite judge whose strength was associated with his Nazirite dedication to God. After Delilah's betrayal, the Philistines captured him, blinded him, and imprisoned him. They later brought him to a temple in Gaza to celebrate his capture and mock him publicly.
Samson prayed for strength one final time and pushed against the temple's supporting pillars. The building collapsed, killing Samson along with the Philistine rulers and the crowd gathered inside. Judges 16:30 explicitly states that the dead he killed at his death were more numerous than those he had killed while living.
The verse does not provide a precise total for all of Samson's lifetime killings, although it records several violent episodes, including his attack on the Philistines at Lehi. The famous comparison is therefore a biblical summary, not a modern numerical statistic. His death scene is also the climax of the story's recurring conflict between Samson and the Philistines.