Sayyiduna Mu'awiyah (may Allah be pleased with him) narrated: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Every sin is such that it is hoped Allah Almighty will forgive it, except a man who dies as a disbeliever, or a man who kills a believer deliberately."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Thawr bin Yazid except al-Mu'afa bin Imran, and al-Hasan bin Bishr is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 5135
Hadith Takhrij«أخرجه الحاكم فى «المستدرك» برقم: 8123، والنسائي فى «المجتبى» برقم: 3995 / 20، والنسائي فى «السنن الكبرى» برقم: 3432، وأحمد فى «مسنده» برقم: 17181، والطبراني فى «الكبير» برقم: 856، 857، 858»