When the Messenger of Allah ﷺ observed I'tikaf, he would put his head near me, and I would comb it. and he entered the house only to fulfill human needs (i.e. to urinate or to relieve himself). (Using translation from Abū Dāʾūd 2467)
أَنَّ النَّبِيَّ ﷺ كَانَ «إِذَا اعْتَكَفَ يُدْنِي إِلَيَّ رَأْسَهُ فَأُرَجِّلُهُ وَكَانَ لَا يَدْخُلُ الْبَيْتَ إِلَّا لِحَاجَةِ الْإِنْسَانِ»