Al-Adab Al-Mufrad, Hadith 269 ⓘ
Anas ibn Malik said, "The Prophet, may Allah bless him and grant him peace, used to mix with us to the extent of asking a younger brother of mine, 'Abu 'Umayr! What has happened to the little sparrow?'"
حَدَّثَنَا آدَمُ، قَالَ: حَدَّثَنَا شُعْبَةُ، قَالَ: حَدَّثَنَا أَبُو التَّيَّاحِ قَالَ: سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَقُولُ: كَانَ النَّبِيُّ صلى الله عليه وسلم لَيُخَالِطُنَا، حَتَّى يَقُولَ لأَخٍ لِي صَغِيرٍ: يَا أَبَا عُمَيْرٍ، مَا فَعَلَ النُّغَيْرُ؟.
also referenced under: Book 14, Hadith 269 (In-Book) & Book 14, Hadith 269 (English)