(29) باب تَحْرِيمِ الْقَتْلِ
It was narrated that Abu Bakrah said:
"The Messenger [SAW] said: 'If two Muslims meet (and fight) with their swords and one of them kills the other, the killer and the slain will both be in Hell.'" (ID)
Reference (ID): Sunan an-Nasa'i 4121 (ID)
In-book reference (ID): Book 37, Hadith 156 (ID)
English translation (ID): Vol. 5, Book 37, Hadith 4126 (ID)