From Sahih Muslim (Hadith 4825):
It has been narrated by Salama b. al-Akwa' that he visited al-Hajjaj who said to him:O son of al-Akwa', you have turned apostate and have come to live again in the desert with the Bedouins (after your migration). He said: No, but the Messenger of Allah (ﷺ) has permitted me to live in the desert
Reference: Muslim 4825