Matthew 18:18-20

18 Most assuredly I tell you, whatever things you will bind on earth will be bound in heaven, and whatever things you will release on earth will be released in heaven.  19 Again, assuredly I tell you, that if two of you will agree on earth concerning anything that they will ask, it will be done for them by my Father who is in heaven.  20 For where two or three are gathered together in my name, there I am in the midst of them.”