It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "If all the inhabitants of the heavens and all the inhabitants of the earth were to join together in killing a single Muslim man, Allah Almighty would throw them all face-down into the Fire."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Hamzah (may Allah have mercy on him) except al-Qasim (may Allah have mercy on him), and Muqaddam (may Allah have mercy on him) is alone in transmitting it."
Hadith Referenceالمعجم الأوسط / باب الألف / 1421
Hadith Takhrij«أخرجه الترمذي فى «جامعه» برقم: 1398، والطبراني فى «الأوسط» برقم: 9242»