Bible Verses About repetitious prayer

Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven.

But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.

But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.

And he spake a parable unto them to this end, that men ought always to pray, and not to faint;

Pray without ceasing.

Casting all your care upon him; for he careth for you.