Matthew 6:6-8

But thou, when thou prayest, enter into thine inner chamber, and having shut thy door, pray to thy Father who is in secret, and thy Father who seeth in secret shall recompense thee. And in praying use not vain repetitions, as the Gentiles do: for they think that they shall be heard for their much speaking. Be not therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.