Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)

Bukhari :: Book 5 :: Volume 59 :: Hadith 488

Narrated Al-Musaiyab:

I met Al-Bara bin 'Azib and said (to him). "May you live prosperously! You enjoyed the company of the Prophet and gave him the Pledge of allegiance (of Al-Hudaibiya) under the Tree." On that, Al-Bara' said, "O my nephew! You do not know what we have done after him (i.e. his death)."