Sahih Muslim 2164
Sahih Muslim · Book 39: The Book of Greetings · The Prohibition Of Initiating The Greeting With The People Of The Book, And How To Respond To Them
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ ، عَنْ سُفْيَانَ ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ ، عَنِ ابْنِ عُمَرَ ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِهِ غَيْرَ أَنَّهُ قَالَ " فَقُولُوا وَعَلَيْكَ " .
This hadith has been narrated on the authority of Ibn 'Umar through another chain of transmitters with a slight variation of wording.