Ante-Nicene Fathers, Vol VIII:
Pseudo-Clementine Literature.: Chapter IV

Chapter IV.—A Request.

“However, I have learned, O Clement, how that in Alexandria Barnabas perfectly expounded to you the word respecting prophecy.  Was it not so?”  I answered, “Yes, and exceeding well.”  Then Peter:  “Therefore it is not necessary now to occupy with the instructions which you know, the time which may serve us for other instructions which you do not know.”  Then said I:  “You have rightly said, O Peter.  But vouchsafe this to me, who purpose always to attend upon you, continuously to expound to me, a delighted hearer, the doctrine of the Prophet.  For, apart from Him, as I learned from Barnabas, it is impossible to learn the truth.”