Matthew 18:18-19
18 "I tell you the truth, whatever you bind on earth will be bound in
heaven, and whatever you loose on earth will be loosed in heaven.
19"Again, I tell you that if two of you
on earth agree about anything you ask for, it will be done for you by
my Father in heaven.
20"For where two or three come together in my name, there am I with
them.”