Hadith 17:407
'Abdah ibn Sulayman narrated to us, from Sa'id, from Qatadah, that a man greeted the Prophet, may Allah bless him and grant him peace, and said: "Upon you be peace, O Messenger of Allah." The Prophet disliked that and said: "That is the greeting of the dead."
حدثنا عبدة بن سليمان عن سعيد عن قتادة أن رجلا سلم على النبي صلى الله عليه وسلم فقال عليك السلام يا رسول الله فكره ذلك النبي وقال تيك تحية الموتى