I read somewhere in either Bukhari or Muslim that Syedna RasulUllah said sometime around the conquest of Mecca (or was it Hunayn?) something to the effect that "do not trouble me about my Sahaba", meaning thereby the old companions (who had been with him at least before the Battle of Ditch or perhaps at Hudaybia?). Does this mean that Sahaba in the real sense were the older companions who had been with the Prophet in difficult times? (May God forgive me if I am wrong in what amounts to nothing more than a stray reflection on the said Hadith)