Etiquette
33/12. Chapter:
Returning (the greeting of) peace
Sunan Ibn Majah
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ، حَدَّثَنَا سَعِيدُ بْنُ أَبِي سَعِيدٍ الْمَقْبُرِيُّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَجُلاً، دَخَلَ الْمَسْجِدَ وَرَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ جَالِسٌ فِي نَاحِيَةِ الْمَسْجِدِ فَصَلَّى ثُمَّ جَاءَ فَسَلَّمَ فَقَالَ " وَعَلَيْكَ السَّلاَمُ " .
It was narrated from Abu Hurairah that: "a man entered the masjid, and the Messenger of Allah(ﷺ) was sitting in a corner of the mosque. He prayed, then he came and greeted him with Salam(peace), and he said: 'Wa 'alaikassalm."
Reference : Sunan Ibn Majah 3695In-book reference : Book 33, Hadith 39English translation : Vol. 5, Book 33, Hadith 3695