Revelation 1:18

1:18 and the one who lives! I was dead, but look, now I am alive – forever and ever – and I hold the keys of death and of Hades!

Revelation 9:1-2

9:1 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. 9:2 He opened the shaft of the abyss and smoke rose out of it like smoke from a giant furnace. The sun and the air were darkened with smoke from the shaft.

Luke 8:31

8:31 And they began to beg him not to order them to depart into the abyss.