وعن المقداد رضي الله عنه في حديثه الطويل
قال: كنا نرفع للنبي صلى الله عليه وسلم نصيبه من اللبن فيجيء من الليل، فيسلم تسليمًا لا يوقظ نائمًا، ويسمع اليقظان، فجاء النبي صلى الله عليه وسلم فسلم كما كان يُسلم
We used to reserve for the Prophet (sallallahu alayhi wa sallam) his share of the milk, and he would come at night and offer greetings in such a manner as did not disturb those asleep and was heard only by those who were awake. In fact, the Prophet (sallallahu alayhi wa sallam) came and offered greetings as usual.
Riyad as-Salihin 853, Book 6, The Book of Greetings, Hadith 10. 1 min read