'Knocking' in the Bible

"Keep asking, and it will be given to you. Keep searching, and you will find. Keep knocking, and the door will be opened for you.

Because everyone who keeps asking will receive, and the person who keeps searching will find, and the person who keeps knocking will have the door opened.

So I say to you: Keep asking, and it will be given you. Keep searching, and you will find. Keep knocking, and the door will be opened for you,

because everyone who keeps asking will receive, and the person who keeps searching will find, and the person who keeps knocking will have the door opened.

Meanwhile, Peter kept on knocking and knocking. When they opened the gate, they saw him and were amazed.

Look! I am standing at the door and knocking. If anyone listens to my voice and opens the door, I will come in to him and eat with him, and he will eat with me.