وَعَنْهُ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «كُلُّ ذَنْبٍ عَسَى اللَّهُ أَنْ يَغْفِرَهُ إِلَّا مَنْ مَاتَ مُشْرِكًا أَوْ مَنْ يقتُلُ مُؤمنا مُتَعَمدا»
He reported God’s Messenger as saying, “God may forgive every sin, except in the case of one who dies a polytheist, or one who purposely kills a believer.”
Mishkat al-Masabih 3331, Book 17, Retaliation, Hadith 20. 1 min read