(29) باب تَحْرِيمِ الْقَتْلِ
It was narrated that Abu Bakrah said:
"The Messenger of Allah [SAW] said: 'If two Muslims fight with swords, and one of them kills the other, then the killer and the slain will both be in Hell.'"
Reference: Sunan an-Nasa'i 4123
In-book reference: Book 37, Hadith 158
English translation: Vol. 5, Book 37, Hadith 4128