Hadith 2151
Chapter 6: It Is Permissible To Say: "O My Son" To Someone Other Than One's Son, And It Is Recommended To Speak Kindly - كتاب الآداب
حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ الْغُبَرِيُّ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ أَبِي عُثْمَانَ، عَنْ أَنَسِ بْنِ، مَالِكٍ قَالَ قَالَ لِي رَسُولُ اللَّهِ صلى الله عليه وسلم " يَا بُنَىَّ " .
Anas b Malik reported that Allah's Messenger (ﷺ) addressed me:
O My Son.
Reference : Sahih Muslim 2151
In-book reference : Book 38, Hadith 38
USC-MSA web (English) reference : Book 25, Hadith 5351