'Knock' in the Bible

Ask, and it shall be given to you. Seek, and ye shall find. Knock, and it shall be opened to you.

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

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: