AHMAD 13881:
from Anas Wa-al-Maʿná Wāḥid —
[Machine] The companions of the Prophet ﷺ said to the Prophet ﷺ: "Indeed, the people of the scripture greet us with peace, so how should we respond to them?" The Prophet ﷺ replied: "Say unto them, 'And upon you be peace.'" Hajjaj said: "Shu'bah reported that I did not ask Qatadah about this hadith, did you hear it from Anas?"
أحمد ١٣٨٨١:
عن انس و-المعنى واحد —
أَنَّ أَصْحَابَ النَّبِيِّ ﷺ قَالُوا لِلنَّبِيِّ ﷺ إِنَّ أَهْلَ الْكِتَابِ يُسَلِّمُونَ عَلَيْنَا فَكَيْفَ نَرُدُّ عَلَيْهِمْ؟ فَقَالَ قُولُوا وَعَلَيْكُمْ وقَالَ حَجَّاجٌ قَالَ شُعْبَةُ لَمْ أَسْأَلْ قَتَادَةَ عَنْ هَذَا الْحَدِيثِ هَلْ سَمِعْتَهُ مِنْ أَنَسٍ؟
hadithunlocked.com