| Gill's Exposition of the Entire Bible And he charged them,.... His disciples, after he had declared his approbation of Peter's confession of faith, and signified he would build his church on that rock, and the gates of hell should not prevail against it: and promised Peter the keys of the kingdom of heaven; and that whatsoever was bound, or loosed by him on earth, should be bound and loosed in heaven; which are omitted by Mark, but related by Matthew, Matthew 16:17, after this he gave a strict and severe charge, that they should tell no man of him; that he was the Messiah, and the Son of God; See Gill on Matthew 16:20.
Geneva Study Bible{7} And he charged them that they should tell no man of him. (7) Christ has appointed certain times for the preaching of the gospel, and therefore here defers it to a more appropriate time, lest sudden haste should rather hinder than further the mystery of his coming.
People's New Testament 8:27-30 Jesus went out... into the towns of Caesarea Philippi. For notes on Peter's confession of Christ, see Mt 16:21-28. Compare Lu 9:22-27. Caesarea Philippi was a heathen town, in the extreme north of Palestine, near the foot of Mount Hermon, and one of the sources of the Jordan.
Wesley's Notes 8:30 He enjoined them silence for the present, That he might not encourage the people to set him up for a temporal king; That he might not provoke the scribes and Pharisees to destroy him before the time and, That he might not forestall the bright evidence which was to be given of his Divine character after his resurrection.
Matthew Henry's Concise Commentary8:27-33 These things are written, that we may believe that Jesus is the Christ, the Son of God. These miracles of our Lord assure us that he was not conquered, but a Conqueror. Now the disciples are convinced that Jesus is the Christ; they may bear to hear of his sufferings, of which Christ here begins to give them notice. He sees that amiss in what we say and do, of which we ourselves are not aware, and knows what manner of spirit we are of, when we ourselves do not. The wisdom of man is folly, when it pretends to limit the Divine counsels. Peter did not rightly understand the nature of Christ's kingdom. | 
