Abu Musa al-Ash`ari said: My brother and I came from the Yemen and for quite a time we had no idea that `Abdallah b. Mas'ud was other than a member of the Prophet's family because of seeing how frequently he and his mother went in to visit the Prophet. (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب المناقب / 6198
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3763) و مسلم (110/ 2460)»