´It was narrated that Nafi said:` "Abdullah, may Allah be pleased with him, said: "I have not failed to touch these two corners since I saw the Messenger of Allah touching them, the Yemeni Corner and Black Stone, either when it is difficult or when it is easy.'"
Hadith Referenceسنن نسائي / كتاب مناسك الحج / 2955
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه