"Whenever you pray, you must not be like the hypocrites, because they love to pray standing in the synagogues and on the street corners to be seen by people. I assure you: They've got their reward!
References for Matthew 6:5
But when you pray, go into your private room, shut your door, and pray to your Father who is in secret. And your Father who sees in secret will reward you.
References for Matthew 6:6
When you pray, don't babble like the idolaters, since they imagine they'll be heard for their many words.
References for Matthew 6:7
Don't be like them, because your Father knows the things you need before you ask Him.