Retiring to a Mosque for Remembrance of Allah (I'tikaf)
كتاب الاعتكاف
Chapter 18: Whoever intended I'tikaf and then changed his mind
Allah's Messenger (ﷺ) mentioned that he would practice I`tikaf in the last ten days of Ramadan. `Aisha asked his permission to perform I`tikaf and he permitted her. Hafsa asked `Aisha to take his permission for her, and she did so. When Zainab bint Jahsh saw that, she ordered a tent to be pitched for her and it was pitched for her. Allah's Messenger (ﷺ) used to proceed to his tent after the prayer. So, he saw the tents ans asked, "What is this?" He was told that those were the tents of Aisha, Hafsa, and Zainab. Allah's Apostle said, "Is it righteousness which they intended by doing so? I am not going to perform I`tikaf." So he returned home. When the fasting month was over, he performed Itikar for ten days in the month of Shawwal.
Chapter 19: A Mu'takif can let his head in the house for washing
Aisha during her menses used to comb and oil the hair of the Prophet (ﷺ) while he used to be in I`tikaf in the mosque. He would stretch out his head towards her while she was in her chamber.