I read somewhere that one of the signs of they day of judgementis that salaam will be said to those you know only.I read that it was a Ahmad hadith, and I never heard of it before so I wanted to make sure.
Answer
The Hadith is narrated by Haakim in Mustadrak (vol.4 pg.524), ibn Khuzaymah (Hadith1326) and Bayhaqi (Hadith3146) and has been classified as authentic by Hafiz al-Dhahabi [ra].
And Allah Ta’ala Knows Best
Mufti Ebrahim Desai