Narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) on the day of the conquest of Makkah came riding on a camel from the higher part of Makkah, with Sayyiduna Usama bin Zaid (may Allah be pleased with him) seated behind him. With him was Sayyiduna Bilal (may Allah be pleased with him), and with him was Uthman bin Talha (who was among the custodians of the Ka'bah), until the Prophet (peace and blessings be upon him) made the camel sit in the mosque. Then he ordered Uthman to bring the key of the Ka'bah, so the Ka'bah was opened and the Messenger of Allah (peace and blessings be upon him) entered it... The rest of the hadith has already been mentioned. (See the Book: Description of Prayer... Chapter: Praying between the pillars without congregation)