Sayyiduna Ya'la bin Umayyah (may Allah be pleased with him) says that once I performed Tawaf with Sayyiduna Umar (may Allah be pleased with him). When I reached the Yemeni Corner, I took the hand of Sayyiduna Umar (may Allah be pleased with him) so that he could perform Istilam. Sayyiduna Umar (may Allah be pleased with him) said: Have you never performed Tawaf with the Prophet (peace and blessings of Allah be upon him)? I said: Why not! He said: Then did you see the Prophet (peace and blessings of Allah be upon him) performing Istilam of it? I said: No! He said: Then leave it, for indeed in the person of the Messenger of Allah (peace and blessings of Allah be upon him) there is a beautiful example for you.