No one knocked upon the door to see if he was hurt.

My hours are limited: I expect any moment that knock upon the door.

At the head of the steps he knocked twice upon a door that needed painting.

On the second floor, we stopped before a heavy wooden door and the guard knocked upon it.

"I am a door to you who knock upon me."

He walked right up the path and knocked upon the door.

The common people will love me until he knocks upon the gates.

Waco had been reading when someone knocked upon the door to his van.

Without much conversation they made their way up the hill and knocked upon the stranger's door.

"Yet we must knock upon the door if it is to be opened to us!"