Holy holy holy
The Old Testament counterpart to the phrase "Holy, holy, holy" is found in Isaiah 6:3.Isaiah 6:3"And one called to another and said: 'Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory!' " (ESV)Key DetailsContext: The prophet Isaiah sees a vision of God in the Temple, surrounded by seraphim (heavenly beings) calling out to each other.Connection to Revelation: The famous line "Holy, holy, holy, Lord God Almighty" in Revelation 4:8 directly echoes and builds upon this foundational scene from Isaiah.Meaning of "Lord of hosts": The Hebrew term translated as "Lord of hosts" (Lord of Armies) represents God's supreme power over all heavenly and earthly armies, similar in majesty to the title "Almighty".