Revelation 1:6 NIV

1 Peter 2:5-9 NIV
you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ. For in Scripture it says: “See, I lay a stone in Zion, a chosen and precious cornerstone, and the one who trusts in him will never be put to shame.” Now to you who believe, this stone is precious. But to those who do not believe, “The stone the builders rejected has become the cornerstone,” and, “A stone that causes people to stumble and a rock that makes them fall.” They stumble because they disobey the message—which is also what they were destined for. But you are a chosen people, a royal priesthood, a holy nation, God’s special possession, that you may declare the praises of him who called you out of darkness into his wonderful light.

Exodus 19:6 NIV
you will be for me a kingdom of priests and a holy nation.’ These are the words you are to speak to the Israelites.”

Revelation 20:6 NIV
Blessed and holy are those who share in the first resurrection. The second death has no power over them, but they will be priests of God and of Christ and will reign with him for a thousand years.

Revelation 5:10 NIV
You have made them to be a kingdom and priests to serve our God, and they will reign on the earth.”