Abdullah ibn Amr reported: The Prophet, peace and blessings be upon him, said, “Whoever kills a person protected by a treaty will never smell the fragrance of Paradise. Verily, its fragrance can be found from a distance of forty years of travel.”
Source: Ṣaḥīḥ al-Bukhārī 6516
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍوعَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ مَنْ قَتَلَ نَفْسًا مُعَاهَدًا لَمْ يَرَحْ رَائِحَةَ الْجَنَّةِ وَإِنَّ رِيحَهَا يُوجَدُ مِنْ مَسِيرَةِ أَرْبَعِينَ عَامًا
6914 صحيح البخاري كتاب الديات باب إثم من قتل ذميا بغير جرم