Just another angle on this I think when John
witnessed and heard what he saw and put down
in scripture ...the very word Hallelujah it was
a angelic sound, an angelic exclamation ..from
heaven to earth...we now can say an angelic
word because of John.
http://www.fpcjackson.org/resources/sermons/Derek's%20SERMONS/revelation/revchpt19.1.htm
What we have in Revelation is the original Hallelujah chorus!
There is something almost indescribable about the worship of heaven. John has to resort to the comparison "like" (19:1, 6, 12). There is no language that adequately describes it. What glory there is in heavenly worship!
Hallelujah! This is what they sing in heaven (19:1, 3, 4, 6). Surprising as it may seem, the word "Hallelujah" occurs for the very first time in the Bible at this point! This fact somewhat obscures the fact that its Hebrew equivalent, often translated "Praise the LORD" occurs frequently in the Old Testament (mainly in the psalms, and over half of these occurrences in the six Psalms 135, 146-150). The word has become so much a part of our Christian vocabulary, we might easily miss the appropriateness of its occurrence (four times) in this chapter. Coming as it does from the Hebrew, "praise Yahweh," it signals the desire of the heavenly multitude (19:1) to render all the praise to the Lord for the accomplishment of this downfall of evil’s tyranny. It is the Lord who has done this great thing.
The word Holy?did it imho come from heaven to earth via the ears and then transcription of the Prophet.
Isaiah 6: 1-3 brings us knowledge of another classification of angels, the Seraphim. Unlike the Cherubim, these creatures do not stand with their back to the throne. Rather, they face the throne, worshipping God continuously, singing, “Holy, holy, holy, is the Lord of hosts: the whole earth is full of His glory!” However, though they worship God, so clearly do these awesome creatures understand their rightful place in reference to God that they worship with two of their wings covering their faces and two covering their feet. Called living creatures (Rev 4:8), these angels stand in contrast with the cherubim, serving to denote the purification necessary for a creature to stand before the Creator. Chafer (Op. cit.), quoting Scofield, states it this way:
The Seraphim are, in many respects, in contrast with the Cherubim though both are expressive of the divine holiness, which demands that the sinner shall have acce3ss to the divine presence only through a sacrifice which really vindicates the righteousness of God (Rom 3.24-26, notes), and that the saint shall be cleansed before serving. Gen. 3.22-24 illustrates the first; Isa. 6.1-8 the second. The Cherubim may be said to have to do with the altar, the Seraphin with the laver.”
Isaiah's Vision and Commission
(A) 1 In the year that King Uzziah died, I saw the Lord sitting on a throne, high and lifted up, and the train of His robe filled the temple. 2Above it stood seraphim; each one had six wings: with two he covered his face, with two he covered his feet, and with two he flew. 3And one cried to another and said:
"Holy, holy, holy is the LORD of hosts;
The whole earth is full of His glory!"
my humble comment: It seems to me that Holy is
an angelic exclamation but I think I am on firmer
ground with Rev. and Hallelujah! just seems
interesting to me.
I have not done detailed study on Hosanna! which again sounds heavenly but probably isn't still it
is interesting to study.
And the blind and the lame came to Him in the Temple, and He healed them. But when the chief priests and the scribes saw the wonderful things that He did, and the children crying out in the Temple, "Hosanna to the Son of David!" they were indignant; and they said to Him, "Do you hear what these are saying?" And Jesus said to them, "Yes; have you never read,
'Out of the mouth of babes and sucklings thou hast brought perfect praise'" (Matthew 21:1-16 RSV)
Hosanna is even more of a stretch one hint it
may be heavenly is the last part of Matthew 21:16
We know this for sure that the Prophet Isaiah
and the Apostle John actually got to tune in
to heavenly angelic praise and exclamations
projecting praise and worth.
Did they bring back some heavenly words spoken
by angels?