It is narrated from Hazrat Aisha (may Allah be pleased with her) that when the Prophet (peace and blessings be upon him) observed i'tikaf, he would only enter the house due to a human need, and he would extend his head out from the mosque, and I would wash it while the door frame stood between me and him.
Hadith Referenceمسند احمد / مسند النساء / 25984
Hadith Gradingحکم دارالسلام:حديث صحيح، سفيان بن حسين ضعيف فى روايته عن الزهري ولكن توبع