Is there support for a triune God (Trinity) in the Old Testame | Christian Aryanism — Fides et Gens, Inseperable.

Is there support for a triune God (Trinity) in the Old Testament? Yes. Isaiah 48:12-16 [Old Testament] ¹⁷⁶⁹ᐟᴷᴶⱽ ¹² Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last. ¹³ Mine hand also hath laid the foundation of…