'Door' in the Bible

and he from within shall answer and say, Trouble me not: the door is now shut, and my children are with me in bed; I cannot rise and give thee?

Strive to enter in by the narrow door: for many, I say unto you, shall seek to enter in, and shall not be able.

When once the master of the house is risen up, and hath shut to the door, and ye begin to stand without, and to knock at the door, saying, Lord, open to us; and he shall answer and say to you, I know you not whence ye are;