When the people of the Book greet you, reply by saying:
وَعَلَيْكُمْ
Pronunciation
Wa 'alaykum
Meaning
And upon you
Source: Bukhari: 6258
Read the hadith
حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ أَبِي بَكْرِ بْنِ أَنَسٍ، حَدَّثَنَا أَنَسُ بْنُ مَالِكٍ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " إِذَا سَلَّمَ عَلَيْكُمْ أَهْلُ الْكِتَابِ فَقُولُوا وَعَلَيْكُمْ " .
Narrated Anas bin Malik: the Prophet (ﷺ) said, "If the people of the Scripture greet you, then you should say (in reply), 'Wa'alaikum (And on you).' " [Bukhari: 6258]
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset