Matthew 18:18-20

18Verily I say to you, Whatsoever ye shall bind on the earth shall be bound in heaven, and whatsoever ye shall loose on the earth shall be loosed in heaven.

19Again I say to you, that if two of you shall agree on the earth concerning any matter, whatsoever it may be that they shall ask, it shall come to them from my Father who is in [the] heavens.

20For where two or three are gathered together unto my name, there am I in the midst of them.