'Door' in the Bible

and he within answering should say, Do not disturb me; the door is already shut, and my children are with me in bed; I cannot rise up to give it thee?

Strive with earnestness to enter in through the narrow door, for many, I say to you, will seek to enter in and will not be able.

From the time that the master of the house shall have risen up and shall have shut the door, and ye shall begin to stand without and to knock at the door, saying, Lord, open to us; and he answering shall say to you, I know you not whence ye are: