Narrated `Abdullah bin `Amr: The Prophet said, "Whoever killed a person having a treaty with the Muslims, shall not smell the smell of Paradise though its smell is perceived from a distance of forty years."
Hadith Referenceصحيح البخاري / کتاب الجزیہ والموادعہ / 3166
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة