We read in Matthew 16:16-20, of Peter's stellar response to Jesus query as to who the disciples say He is:
Simon Peter answered, “You are the Messiah, the Son of the living God.” 17 Jesus replied, “Blessed are you, Simon son of Jonah, for this was not revealed to you by flesh and blood, but by my Father in heaven. 18 And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it. 19 I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.” 20 Then he ordered his disciples not to tell anyone that he was the Messiah.
Now, Mark 8 also mentions the event of Peter's testimony, but it does not mention Jesus appreciating Peter's response as in Verses 17-19 of Matthew . Mark rather goes on to record Jesus reprimanding Peter for the latter' advice against the ensuing Passion ( Verses 31-33). Is it possible that the two events namely, testimony of Peter and Jesus promising him the keys of heaven actually took place on two different occasions, on account of which Mark did not mention the second one ? What is the view of Bible scholars on such a possibility ?