(37) باب اجْتِمَاعِ الْقَاتِلِ وَالْمَقْتُولِ فِي سَبِيلِ اللَّهِ فِي الْجَنَّةِ .
It was narrated from Abu Hurairah that the Prophet (ﷺ) said:
"Allah, the Mighty and Sublime, likes it when there are two men, one of whom killed the other, then they both enter Paradise." And another time he said: "He laughs at two men, one of whom killed the other, then they both entered Paradise." (ID)
Reference (ID): Sunan an-Nasa'i 3165 (ID)
In-book reference (ID): Book 25, Hadith 81 (ID)
English translation (ID): Vol. 1, Book 25, Hadith 3167 (ID)