Riyad as-Saliheen 121
Abu Dharr (May Allah be pleased with him) reported:
The Prophet ﷺ said, "Do not belittle any good deed, even meeting your brother (Muslim) with a cheerful face".
[Muslim].
-الخامس: عنه قال لي النبي ﷺ:
" لا تحقرن من المعروف شيئاً ولو أن تلقى أخاك بوجهٍ طليق" ((رواه مسلم)).
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 121
Riyad as-Saliheen Book of Miscellany, Hadith 121