Narrated Anas bin Malik: The Prophet ﷺ said to him: My sonny. Abu Dawud said: I heard Yahya bin Main praising the transmitter Muhammad bin Mahbub, and he said: He transmitted a large number of traditions.
Hadith Referenceسنن ابي داود / كتاب الأدب / 4964
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم (2151)
Hadith Takhrij« صحیح مسلم/الأدب 6 (2151)، سنن الترمذی/الأدب 62 (2831)، (تحفة الأشراف: 514)، وقد أخرجہ: مسند احمد (3/163) (صحیح) »
Benefits and Issues: There is no harm in affectionately calling someone else's child "son" or "my son." The command in Surah Al-Ahzab that they should be called by their fathers' names is regarding adopted children, so that their real lineage is not erased. Otherwise, saying this affectionately or figuratively in this manner is permissible.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4964