Now when Jesus came into the district of Caesarea Philippi, He was asking His disciples, "Who do people say that the Son of Man is?"  And they said, "Some say John the Baptist; and others, Elijah; but still others, Jeremiah, or one of the prophets." He said to them, "But who do you say that I am?" Simon Peter answered, "You are the Christ, the Son of the living God." And Jesus said to him, "Blessed are you, Simon Barjona, because flesh and blood did not reveal this to you, but My Father who is in heaven. – Matthew 16:13-18 NASU

So Jesus said to the twelve, "You do not want to go away also, do you?" Simon Peter answered Him, "Lord, to whom shall we go? You have words of eternal life. "We have believed and have come to know that You are the Holy One of God." - John 6:67-69 NASU

They said to the woman, "We no longer believe just because of what you said; now we have heard for ourselves, and we know that this man really is the Savior of the world."  - John 4:42 NIV.