كتاب السلام
39  
The Book of Greetings
(4)
Chapter: The Prohibition Of Initiating The Greeting With The People Of The Book, And How To Respond To Them
(4)
باب النَّهْىِ عَنِ ابْتِدَاءِ، أَهْلِ الْكِتَابِ بِالسَّلاَمِ وَكَيْفَ يَرُدُّ عَلَيْهِمْ ‏‏
Sahih Muslim 2165 c

'A'isha reported that some Jews came to Allah's Apostle (ﷺ) and they said:

Abu'l-Qasim (the Kunya of the Holy Prophet), as-Sam-u-'Alaikum, whereupon he (the Holy Prophet) said: Wa 'Alaikum. A'isha reported: In response to these words of theirs, I said: But let there be death upon you and disgrace also, whereupon Allah's Messenger (ﷺ) said: 'A'isha, do not use harsh words. She said: Did you hear what they said? Thereupon he (the Holy Prophet) said: Did I not respond to them when they said that; I said to them: Wa 'Alaikum (let it be upon you).
حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ مُسْلِمٍ، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ، قَالَتْ أَتَى النَّبِيَّ صلى الله عليه وسلم أُنَاسٌ مِنَ الْيَهُودِ فَقَالُوا السَّامُ عَلَيْكَ يَا أَبَا الْقَاسِمِ ‏.‏ قَالَ ‏"‏ وَعَلَيْكُمْ ‏"‏ ‏.‏ قَالَتْ عَائِشَةُ قُلْتُ بَلْ عَلَيْكُمُ السَّامُ وَالذَّامُ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ يَا عَائِشَةُ لاَ تَكُونِي فَاحِشَةً ‏"‏ ‏.‏ فَقَالَتْ مَا سَمِعْتَ مَا قَالُوا فَقَالَ ‏"‏ أَوَلَيْسَ قَدْ رَدَدْتُ عَلَيْهِمُ الَّذِي قَالُوا قُلْتُ وَعَلَيْكُمْ ‏"‏ ‏.‏
Reference : Sahih Muslim 2165c
In-book reference : Book 39, Hadith 13
USC-MSA web (English) reference : Book 26, Hadith 5386
  (deprecated numbering scheme)