Mujahid (may Allah have mercy on him) says that once I and Urwah bin Zubair (may Allah have mercy on him) entered the mosque. We reached Sayyiduna Ibn Umar (may Allah be pleased with them both) and sat with him. There were some people performing the Duha prayer there. We asked him, "O Abu Abdur Rahman, what kind of prayer is this?" He replied, "It is an innovation." We asked him, "How many Umrahs did the Prophet (peace and blessings be upon him) perform?" He replied, "Four, one of which was in Rajab." We felt shy to refute his statement, but at that moment we heard the sound of the Mother of the Believers, Sayyidah Aisha (may Allah be pleased with her) using the miswak. So Urwah bin Zubair (may Allah have mercy on him) said to her, "O Mother of the Believers, did you hear what Abu Abdur Rahman is saying? He says that the Prophet (peace and blessings be upon him) performed four Umrahs, one of which was in Rajab." She replied, "May Allah have mercy on Abu Abdur Rahman. Whenever the Prophet (peace and blessings be upon him) performed Umrah, he was present with him, and the Prophet (peace and blessings be upon him) did not perform any Umrah in Rajab."