Hadith 1
The Book of Fighting [The Prohibition of Bloodshed]
It was narrated that Abu Idris said:
"I heard Mu'awiyah delivering the Khutbah, and he narrated a few Hadiths from the Messenger of Allah [ﷺ]." He said: "I heard him delivering a Khutbah and he said: 'I heard the Messenger of Allah [ﷺ] say: Every sin may be forgiven by Allah except a man who kills a believer deliberately, or a man who dies as a disbeliever.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا صَفْوَانُ بْنُ عِيسَى، عَنْ ثَوْرٍ، عَنْ أَبِي عَوْنٍ، عَنْ أَبِي إِدْرِيسَ، قَالَ سَمِعْتُ مُعَاوِيَةَ، يَخْطُبُ - وَكَانَ قَلِيلَ الْحَدِيثِ - عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ سَمِعْتُهُ يَخْطُبُ يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ
كُلُّ ذَنْبٍ عَسَى اللَّهُ أَنْ يَغْفِرَهُ إِلاَّ الرَّجُلُ يَقْتُلُ الْمُؤْمِنَ مُتَعَمِّدًا أَوِ الرَّجُلُ يَمُوتُ كَافِرًا
Hadith gradings, numbering and translations can differ between editions. For legal rulings or detailed interpretation, consult qualified scholarship and the referenced edition.