Maliks Muwatta Book 019, Hadith Number 001.

Section : Mention of Itikaf.

Yahya related to me from Malik from Ibn Shihab from Urwa ibn az-Zubayr from Amra bint Abd ar-Rahman that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "When the Messenger of Allah, may Allah bless him and grant him peace, did itikaf he would bring his head near to me and I would comb it. He would only go into the house to relieve himself."