I am He that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.@Revelation 1:18
Philip Doddridge (1702–1751)

Philip Doddridge (1702–1751). Published posthumously in Hymns Founded on Various Texts in the Holy Scriptures, by Job Orton (Shropshire, England: Joshua Eddowes & John Cotton, 1755), number 351: The keys of death and the unseen world in Christ’s hand.

Church Triumphant James W. Elliott, 1874 (🔊 pdf nwc).

Hail to the Prince of life and peace,
Who holds the keys of death and hell!
The spacious world unseen is His,
And sovereign power becomes Him well.

In shame and torment once He died,
But now He lives for evermore;
Bow down, ye saints, around His seat;
And all ye angel bands, adore.

So live for ever, glorious Lord,
To crush Thy foes, and guard Thy friends;
While all Thy chosen tribes rejoice,
That Thy dominion never ends.

Worthy Thy hands to hold the keys,
Guided by wisdom, and by love;
Worthy to rule o’er mortal life,
O’er worlds below and worlds above.

When death Thy servants shall invade,
When powers of hell Thy church annoy,
Controlled by Thee, their rage shall help
The cause they labored to destroy.

For ever reign, victorious King:
Wide through the earth Thy name be known;
And call my longing soul to sing
Sublimer anthems near Thy throne.