Abu Al-Tufail says that whenever Sayyiduna Amir Muawiyah (may Allah be pleased with him) passed by any corner of the Ka'bah, he would perform istilam (touching or kissing). Sayyiduna Ibn Abbas (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) used to perform istilam only of the Black Stone and the Yemeni Corner. Sayyiduna Muawiyah (may Allah be pleased with him) replied that no part of the House of Allah is abandoned or neglected.