"And I will give unto thee the keys of the king-
 dom of heaven: 
and whatsoever 
thou shalt bind on 
earth 
shall be bound in 
heaven: and
whatsoever 
thou shalt loose 
on earth shall be
loosed in heaven" Matthew 16:19
Peter wasn't the only one to get this promise;
as seen in Matthew 18:18 the keys of the
kingdom of heaven, which included power to
bind and to loose was also given to the apostles.