O son of Al-Akwa, you have turned on your heels (i.e., deserted Islam) by staying in the desert with the Bedouins." He said: "No; the Messenger of Allah gave me permission to stay in the desert with the Bedouins.  

لاَ وَلَكِنَّ رَسُولَ اللَّهِ ﷺ أَذِنَ لِي فِي الْبُدُوِّ