Mukhtasar Bukhari

It was asked from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both): "How many Umrahs did the Noble Prophet (peace and blessings of Allah be upon him) perform?" Ibn Umar (may Allah be pleased with them both) replied: "Four. One of them was in Rajab." Then the questioner said: "I asked Umm al-Mu'mineen Aisha (may Allah be pleased with her): 'Have you heard what Abu Abdur Rahman (Ibn Umar, may Allah be pleased with them both) is saying?'" Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) asked: "What is he saying?" He said: "He says that the Messenger of Allah (peace and blessings of Allah be upon him) performed four Umrahs, one of which was in Rajab." Umm al-Mu'mineen Aisha (may Allah be pleased with her) replied: "May Allah have mercy on Abu Abdur Rahman. When the Messenger of Allah (peace and blessings of Allah be upon him) performed Umrah, he was certainly with him, but (even then he forgot) the Messenger of Allah (peace and blessings of Allah be upon him) never performed Umrah in the month of Rajab."