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.
Sunan an-Nasa'i Book 39, Hadith 38
← Previous Hadith a Bedouin pledged Islam to the Messenger of Allah, then the Bedouin was stricken with the fever in Al-Madinah. So he came to the Messenger of Allah and said: "O Messenger of Allah, cancel my pledge," but he refused. Then he came to him again and said: "Cancel my pledge," but he refused. Then he came to him again and said: "Cancel my pledge," but he refused. Then the Bedouin left (Al-Madinah) and the Messenger of Allah sadi: "Al-Madinah his like the bellows; it expels its dross and brightness its good.

Sunan an-Nasa'i Book 39, Hadith 37 Next Hadith → "We used to pledge to the Messenger of Allah to hear and obey, the he said: 'In as much as you can."'

Sunan an-Nasa'i Book 39, Hadith 39