The One Who Is, Was, and Is to Come
הַהֹוֶה וְהָיָה וְיָבוֹא (modern Heb NT)
Revelation's unfolding of Ehyeh — the I AM stretched across past, present, and future.
The LXX rendered Ehyeh as ho ōn — 'the One Who Is' — and Revelation grows the participle into a threefold name spanning time itself. Greek icons of Christ letter ὁ ὤν into His halo; the burning bush still burns there.
First occurrence
Rev 1:4 — The book's opening greeting
Key passages
Rev 1:8 — With Alpha-Omega and Pantokrator
Rev 4:8 — The living creatures' unceasing song
Exod 3:14 — The bush behind the vision
In the Greek Scriptures
ὁ ὢν καὶ ὁ ἦν καὶ ὁ ἐρχόμενος