Arabic (Original)
حَدَّثَنَا هُشَيْمٌ أَنْبَأَنَا عُبَيْدُ اللَّهِ بْنُ أَبِي بَكْرِ بْنِ أَنَسٍ عَنْ جَدِّهِ أَنَسِ بْنِ مَالِكٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا سَلَّمَ عَلَيْكُمْ أَهْلُ الْكِتَابِ فَقُولُوا وَعَلَيْكُمْ.
English Translation
Hushaym told us, Ubaydullah ibn Abi Bakr ibn Anas informed us, from his grandfather Anas ibn Malik, who said: The Messenger of Allah (peace and blessings be upon him) said: "When the People of the Book greet you, say [only]: 'And upon you.'"