Ubaid bin Umair once asked Hazrat Ibn Umar (may Allah be pleased with them both), "I see you pushing through the crowd to touch the two corners, the Hajar Aswad and the Yemeni Corner. What is the reason for this?" Hazrat Ibn Umar (may Allah be pleased with them both) replied, "If I do so, it is because I heard the Prophet (peace and blessings be upon him) say that touching these two corners wipes away a person's sins. And I also heard the Prophet (peace and blessings be upon him) say that whoever completes seven circuits of Tawaf, counting them, (and then offers two units of prayer for Tawaf), for every step a good deed will be written, a sin will be erased, a rank will be elevated, and it is equal to freeing a slave."