'Knock' in the Bible

"Ask and it will be given to you; seek and you will find; knock and it will be opened for you.

And I tell you, ask and it will be given to you; seek and you will find; knock and it will be opened for you.

when once the master of the house has gotten up and shut the door, and you begin to stand outside and knock [on] the door, saying, 'Lord, open [the door] for us!' And he will answer [and] say to you, 'I do not know where you are from!'

But Peter was continuing to knock, and [when they] opened [the door] they saw him and were astonished.

Behold, I stand at the door and knock! If anyone hears my voice and opens the door, indeed I will come in to him and dine with him, and he with me.