Abu al-Tufayl said: Mu'awiyah (may Allah be pleased with him) performed Hajj, and he would not come to any corner of the House without touching it. Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) used to touch only the Yemeni corner and the Black Stone. Mu'awiyah (may Allah be pleased with him) said: None of the corners of the House is to be neglected.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10590