Sunan An-Nasa'i

It was narrated from Salamah bin Al-Akwa ' that he entered upon Al-Hajjaj who said: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