And if one prevail against him, two shall withstand him; and a threefold cord is not quickly broken. Ecclesiastes 4:12 KJV
Two are better than one. Partners in prayer are invicible. God honors unity and agreement and will answer the prayer of agreement.
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. Matthew 18:19 KJV
Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much. James 5:16 KJV