Matthew 6:7
"While praying do not say the same words over and over again, as the Gentiles do, for they suppose that by their much speaking they will gain attention.
Matthew 23:13
"But woe unto you, Scribes and Pharisees, hypocrites! You shut the kingdom of heaven in men's faces; for you do not enter, yourselves, nor do you permit those who are about to come in, to enter.
Luke 13:25-28
"when once the master of the house is risen up and has shut the door. You will begin to stand outside, and to knock at the door, crying, "'Lord, open to us.' "'I do not know were you came from,' he will reply.
1 Timothy 2:8
My wish, then, is that in every place the men should offer prayer, lifting up holy hands, free from anger and disputation;