حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، عَنْ عَمْرَةَ بِنْتِ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا اعْتَكَفَ يُدْنِي إِلَىَّ رَأْسَهُ فَأُرَجِّلُهُ وَكَانَ لاَ يَدْخُلُ الْبَيْتَ إِلاَّ لِحَاجَةِ الإِنْسَانِ ‏.‏

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 theProphet, may Allah bless him and grant him peace, said,"When theMessenger of Allah, may Allah bless him and grant him peace, diditikaf he would bring his head near to me and I would comb it. Hewould only go into the house to relieve himself." Translation Not Available

Book Ref: Muwatta Imam Malik Book 19 Hadith 693
Web Ref:  Muwatta Imam Malik Book 19 Hadith 1