Matthew 6:6

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.

(2) The best place for prayer is characterized by secrecy, privacy, and quietness. The secret place, the private room, the inner chamber, the shut door - these are the best situations in which acceptable prayer may be offered.