It is narrated from Anas (may Allah be pleased with him), he said: You do such deeds which, in your eyes, are finer than a hair (i.e., extremely insignificant), whereas in the time of the Messenger of Allah (peace and blessings be upon him), we used to consider them destructive. Narrated by al-Bukhari.
Hadith Referenceمشكوة المصابيح / كتاب الرقاق / 5355
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «رواه البخاري (6492)»