The Book of Oaths (qasamah), Retaliation and Blood Money
45/14, 15: Chapter
Seriousness Of Killing The One With A Covenant (Al-Mu'ahad)1
Sunan an-Nasai
أَخْبَرَنَا عَبْدُ الرَّحْمَنِ بْنُ إِبْرَاهِيمَ، دُحَيْمٌ قَالَ حَدَّثَنَا مَرْوَانُ، قَالَ حَدَّثَنَا الْحَسَنُ، - وَهُوَ ابْنُ عَمْرٍو - عَنْ مُجَاهِدٍ، عَنْ جُنَادَةَ بْنِ أَبِي أُمَيَّةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ قَتَلَ قَتِيلاً مِنْ أَهْلِ الذِّمَّةِ لَمْ يَجِدْ رِيحَ الْجَنَّةِ وَإِنَّ رِيحَهَا لَيُوجَدُ مِنْ مَسِيرَةِ أَرْبَعِينَ عَامًا " .
It was narrated that 'Abdullah bin 'Amr said: "The Messenger of Allah said: 'Whoever kills a person from among Ahl Adh-Dhimmah, he will not smell the fragrance of Paradise, and its fragrance may be detected from a distance of forty years."
Reference : Sunan an-Nasa'i 4750In-book reference : Book 45, Hadith 45English translation : Vol. 5, Book 45, Hadith 4754