Revelation 3:7
And to the angel of the church in Philadelphia write, These things says the Holy One, the True, he that has the key of David, he that opens and no one shall shut, and shuts and no one shall open,
Matthew 16:18-19
And I tell you that you are Peter [a rock], and upon this rock will I build my assembly, and the gates of hades shall not prevail against it.
Matthew 18:18-19
I tell you truly, that whatever you bind on the earth shall be bound in heaven, and whatever you unbind on the earth shall be unbound in heaven.
Revelation 1:18
and the living, and I was dead, and behold, I am living forever and ever; and I have the keys of death and of hades.