A group of Jews came to Messenger of Allah ﷺ and said, "As-samu 'Alaika " (Death be on you), and I understood it and said to them, "Alaikum AsSamu wa-l-la'na (Death and curse be on you)." Allah's Apostle said, "Be calm! O ʿAisha, for Allah loves that one should be kind and lenient in all matters." I said. "O Messenger of Allah ﷺ! Haven't you heard what they have said?" Messenger of Allah ﷺ said, "I have (already) said (to them), 'Alaikum (upon you).' "  

دَخَلَ رَهْطٌ مِنَ الْيَهُودِ عَلَى رَسُولِ اللَّهِ ﷺ فَقَالُوا السَّامُ عَلَيْكَ فَفَهِمْتُهَا فَقُلْتُ عَلَيْكُمُ السَّامُ وَاللَّعْنَةُ فَقَالَ رَسُولُ اللَّهِ ﷺ مَهْلاً يَا عَائِشَةُ فَإِنَّ اللَّهَ يُحِبُّ الرِّفْقَ فِي الأَمْرِ كُلِّهِ فَقُلْتُ يَا رَسُولَ اللَّهِ أَوَلَمْ تَسْمَعْ مَا قَالُوا قَالَ رَسُولُ اللَّهِ ﷺ فَقَدْ قُلْتُ وَعَلَيْكُمْ  

Messenger of Allah ﷺ said, "When the Jews greet you, they usually say, 'As-Samu 'alaikum (Death be on you),' so you should say (in reply to them), 'Wa'alaikum (And on you).  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا سَلَّمَ عَلَيْكُمُ الْيَهُودُ فَإِنَّمَا يَقُولُ أَحَدُهُمُ السَّامُ عَلَيْكَ فَقُلْ وَعَلَيْكَ  

the Prophet ﷺ said, "If the people of the Scripture greet you, then you should say (in reply), 'Wa'alaikum (And on you).' "  

قَالَ النَّبِيُّ ﷺ إِذَا سَلَّمَ عَلَيْكُمْ أَهْلُ الْكِتَابِ فَقُولُوا وَعَلَيْكُمْ