Arabic (Original)
حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ حَدَّثَنَا شُعْبَةُ عَنْ هِشَامِ بْنِ زَيْدِ بْنِ أَنَسٍ قَالَ سَمِعْتُ أَنَسًا يَقُولُ جَاءَ رَجُلٌ مِنْ أَهْلِ الْكِتَابِ فَسَلَّمَ عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ السَّامُ عَلَيْكُمْ فَقَالَ عُمَرُ يَا رَسُولَ اللَّهِ أَلَا أَضْرِبُ عُنُقَهُ قَالَ لَا إِذَا سَلَّمُوا عَلَيْكُمْ فَقُولُوا وَعَلَيْكُمْ.
English Translation
Sulayman ibn Dawud told us, Shu'bah told us, from Hisham ibn Zayd ibn Anas, who said: I heard Anas say: A man from the People of the Book came and greeted the Prophet, peace and blessings be upon him, saying: Death be upon you. Umar said: O Messenger of Allah, shall I not strike his neck? He said: No. When they greet you, say: And upon you.