Sayyiduna Ibn Umar (may Allah be pleased with him) narrates that the Messenger of Allah (peace be upon him) forbade a Muslim woman from undertaking a journey of three days without a mahram. Imam Abu Bakr (may Allah have mercy on him) says that I have mentioned the wording of this hadith in Kitab al-Kabir, and this narration of Sayyiduna Ibn Umar (may Allah be pleased with them both) is brief, not detailed, because it does not mention the husband, whereas the narration of Sayyiduna Abu Sa'id (may Allah be pleased with him) is detailed, in which the mention of mahram relatives and the husband is present.