that the Prophet (ﷺ) said: "The world ceases to exist is less significant to Allah than killing a Muslim man."
Jami` at-Tirmidhi Book 16, Hadith 10
← Previous Hadith that a girl went out in Al-Madinah wearing some silver ornaments. A Jew grabbed her and fractured her head with a stone, and he took the jewelry she had on. He said: "She was found with some spark of life in her, and was brought to the Prophet (ﷺ) and he said: 'Did such and such person strike you?' She nodded 'no' with her head. He said: 'Such and such?' until he named the Jew and she nodded 'yes' with her head." He said: "He was brought and recognized so the Messenger of Allah (ﷺ) ordered that his head be crushed between two stones."

Jami` at-Tirmidhi Book 16, Hadith 9 Next Hadith → (Another chain) from 'Abdullah bin 'Amr, and it is similar but he did not narrated it in Marfu' form.

Jami` at-Tirmidhi Book 16, Hadith 11