There are a few occasions in the Bible where we find angels worshipping God by saying, “holy, holy, holy” three times. Some Trinitarians have alleged that the angels were worshipping three distinct divine persons of a Trinity by saying holy, holy, holy three times. Does this prove that the angels were worshipping three coequally distinct God Persons?
Revelation 4:8 states that four angelic creatures worshiped God saying, “HOLY, HOLY, HOLY is THE LORD GOD, THE ALMIGHTY, WHO WAS AND WHO IS AND WHO IS TO COME” Notice that the God who the angels were worshipping was called a “Who” in the singular rather than a “they” or “them” in the plural. Likewise, Isaiah 6:3 states that the angels worshiped God by saying, “Holy, Holy, Holy, is the LORD of hosts, the whole earth is full of His glory”. Again, the angelic worshippers said “holy, holy, holy” by speaking of “the LORD” in the singular and “HIS glory” in the singular. If Trinitarians believe that this proves that the angels worship God as a plurality of three divine persons, then why did the angels never speak of God as a they, their, or them? All Trinitarian apologists I have debated often speak of Jehovah God as a “they”, “their” and “them” but why did the angels never speak this way anywhere in the Bible?
Could the angels have been worshipping three distinct Jehovah God Persons as one deity by saying, “holy, holy, holy” three times, once for each distinct true God Person of a Trinity? There is absolutely no evidence to substantiate this claim. Repeating something three times is likely a Hebrew idiom for expressing emphasis just as Jeremiah 22:29 says, “O earth, earth, earth, hear the word of the LORD”. Are we to believe that there are three Earth’s because Jeremiah prophesied saying, “O earth, earth, earth” three times? This is the same thing as saying that there are three Holy God Persons because the angels said "holy" three times. Wherefore, whenever the same word is spoken three times together in scripture, it stands for emphasis rather than three persons or objects.