Matthew 6:5-7

5And when ye pray, ye shall not be as the hypocrites: for they love to stand and pray in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have received their reward. 6But 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. 7And in praying use not vain repetitions, as the Gentiles do: for they think that they shall be heard for their much speaking.