The Evangelists usually make Peter the spokesperson for all
the apostles.
Mark 8:29
And he (Jesus) asked them, "But who do you say
that
I am?" Peter said to him in reply, "You are the Messiah."
Matthew 18:21
Then Peter
approaching asked him, "Lord, if my brother
sins against me, how often must I forgive him? As many
as seven times?"
Luke 12:41
Then Peter
said, "Lord, is this parable meant for us or
for everyone?"