It is narrated from Sayyiduna Miqdad bin Aswad (may Allah be pleased with him), he says that when the Prophet (peace and blessings be upon him) would come at night, he would greet in such a manner that the one who was asleep would not wake up and the one who was awake would hear it.
Hadith Referenceالادب المفرد / كتاب السلام / 1028
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : صحيح مسلم ، الأشربة ، حديث : 2055»