Matthew 18 : 18 to 20

Receive this truth: Whatever you forbid on earth will be considered to be forbidden in heaven, and whatever you release on earth will be considered to be released in heaven.

Again, I give you an eternal truth: If two of you agree to ask God for something in a symphony of prayer, my heavenly Father will do it for you.  For wherever two or three come together in honour of my name, I am right there with them!