'Knock' in the Bible

Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:

And I say unto you, Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you.

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, Lord, open unto us; and he shall answer and say unto you, I know you not whence ye are:

Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.