(4) باب النَّهْىِ عَنِ ابْتِدَاءِ، أَهْلِ الْكِتَابِ بِالسَّلاَمِ وَكَيْفَ يَرُدُّ عَلَيْهِمْ
Anas b. Malik reported Allah's Messenger (ﷺ) as saying:
When the People of the Book offer you salutations, you should say: The same to you. (AR)
Reference (AR): Sahih Muslim 2163 a (AR)
In-book reference (AR): Book 39, Hadith 7 (AR)
USC-MSA web (English) reference(deprecated numbering scheme): Book 26, Hadith 5380 (AR)