What did Samson use to strike down a thousand men?

Answer: A donkey's jawbone

Finding a fresh jawbone of a donkey, he grabbed it and struck down a thousand men.

“He found the fresh jawbone of a donkey, reached out his hand and took it, and struck down a thousand men. Then Samson said: “With the jawbone of a donkey I have piled them into heaps. With the jawbone of a donkey I have slain a thousand men.””— Judges 15:15-16 (BSB)