(194) باب حَذْفِ التَّسْلِيمِ
Narrated AbuHurayrah:
The Prophet (ﷺ) said: Shortening the salutation is sunnah (commendable).The narrator 'Isa said: Ibn al-Mubarak prohibited me from reporting this tradition as a statement of the Prophet (ﷺ).Abu Dawud said: I heard Abu 'Umar 'Isa b. Yunus al-Fakhuri al-Ramil saying: When al-Firyabi returned from Mecca, he gave up narrating this tradition as a statement of the Prophet (ﷺ). He said: Ahmad b. Hanbal forbade to report this tradition directly from the Prophet (ﷺ).
Reference: Sunan Abi Dawud 1004
In-book reference: Book 2, Hadith 615
English translation: Book 3, Hadith 999