Matthew 18:18-20

18 Verily I say unto you, Whatsoever ye shall bind on earth shall be bound in heaven: and whatsoever ye shall loose on earth shall be loosed in heaven. 19 Again I say unto you, That if two of you shall agree on earth as touching any thing that they shall ask, it shall be done for them of my Father which is in heaven. 20 For where two or three are gathered together in my name, there am I in the midst of them.

Joshua 23:6-11

6 Be ye therefore very courageous to keep and to do all that is written in the book of the law of Moses, that ye turn not aside therefrom to the right hand or to the left; 7 That ye come not among these nations, these that remain among you; neither make mention of the name of their gods, nor cause to swear by them, neither serve them, nor bow yourselves unto them: 8 But cleave unto the Lord your God, as ye have done unto this day. 9 For the Lord hath driven out from before you great nations and strong: but as for you, no man hath been able to stand before you unto this day. 10 One man of you shall chase a thousand: for the Lord your God, he it is that fighteth for you, as he hath promised you. 11 Take good heed therefore unto yourselves, that ye love the Lord your God.