O Clavis David: O Key of David

And I will place on his shoulder the key of the house of David. He shall open, and none shall shut; and he shall shut, and none shall open.

...

“I am the Lord; I have called you in righteousness;
    I will take you by the hand and keep you;
I will give you as a covenant for the people,
    a light for the nations,
    to open the eyes that are blind,
to bring out the prisoners from the dungeon,
    from the prison those who sit in darkness.

...

Of the increase of his government and of peace
    there will be no end,
on the throne of David and over his kingdom,
    to establish it and to uphold it
with justice and with righteousness
    from this time forth and forevermore.
The zeal of the Lord of hosts will do this.

(Isaiah 22.22; 42.6-7; 9.7)