Matthew 6:7
But when ye pray, use not vain repetitions, as the heathen do; for they think that they shall be heard for the multitude of their words.
Matthew 23:13
But woe to you, scribes and Pharisees, hypocrites I because ye shut up the kingdom of heaven against men; for ye go not in yourselves, nor suffer those who are entering to go in.
Luke 13:25-28
When once the master of the house shall have risen, and shut the door, and ye begin to stand without, and to knock at the door, saying, Lord, open to us, and he answering shall say to you, I know not whence ye are;
1 Timothy 2:8
I desire, then, that the men pray in every place, lifting up holy hands, without wrath and doubting.