General Behavior (Kitab Al-Adab)

Dawud :: Book 41 : Hadith 5190

Narrated AbuJurayy al-Hujaymi:

I came to the Prophet (peace_be_upon_him) and said: Upon you be peace, Apostle of Allah! He said: Do not say: Upon you be peace, for "Upon you be peace" is the salutation to the dead.

Source materials are from the University of Southern California MSA site
Hadith eBooks converted from Imaan Star