(35) باب بَيَانِ الرَّجُلَيْنِ يَقْتُلُ أَحَدُهُمَا الآخَرَ يَدْخُلاَنِ الْجَنَّةَ
The same tradition has been narrated on the authority of Abu Zinad (with the same chain of transmitters).
Reference: Sahih Muslim 1890 b
In-book reference: Book 33, Hadith 189
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4659