'Door' in the Bible

and he from within will answer and say, 'Don't bother me. The door is now shut, and my children are with me in bed. I can't get up and give it to you'?

"Strive to enter in by the narrow door, for many, I tell you, will seek to enter in, and will not be able.

When once the master of the house has risen up, and has shut the door, and you begin to stand outside, and to knock at the door, saying, 'Lord, Lord, open to us!' then he will answer and tell you, 'I don't know you or where you come from.'