'Key' in the Bible

They waited so long they were embarrassed, but he still did not open the doors of the upper room. Finally they took the key and opened the doors. Right before their eyes was their master, sprawled out dead on the floor!

They would spend the night in their posts all around God's sanctuary, for they were assigned to guard it and would open it with the key every morning.

I will place the key to the house of David on his shoulder. When he opens the door, no one can close it; when he closes the door, no one can open it.

Woe to you experts in religious law! You have taken away the key to knowledge! You did not go in yourselves, and you hindered those who were going in."

"To the angel of the church in Philadelphia write the following: "This is the solemn pronouncement of the Holy One, the True One, who holds the key of David, who opens doors no one can shut, and shuts doors no one can open:

Then the fifth angel blew his trumpet, and I saw a star that had fallen from the sky to the earth, and he was given the key to the shaft of the abyss.

Then I saw an angel descending from heaven, holding in his hand the key to the abyss and a huge chain.