'Key' in the Bible

And they went on waiting till they were shamed, but the doors were still shut; so they took the key, and, opening them, saw their lord stretched out dead on the floor.

And I will give the key of the family of David into his care; and what he keeps open will be shut by no one, and what he keeps shut no one will make open.

A curse is on you, teachers of the law! for you have taken away the key of knowledge: you did not go in yourselves, and you got in the way of those who were going in.

And to the angel of the church in Philadelphia say: These things says he who is holy, he who is true, he who has the key of David, opening the door so that it may be shut by no one, and shutting it so that it may be open to no one.

And at the sounding of the fifth angel I saw a star falling from heaven to the earth: and there was given to him the key of the great deep.

And I saw an angel coming down out of heaven, having the key of the great deep and a great chain in his hand.