the trinity in the OT
Isaiah 48: 12 “Listen to Me, O Jacob, and Israel, My called: I am He, I am the First, I am also the Last. 13 Indeed My hand has laid the foundation of the earth, And My right hand has stretched out the heavens; When I call to them, They stand up together. 14 '"All of you, assemble yourselves, and hear! Who among them has declared these things? The LORD loves him; He shall do His pleasure on Babylon, And His arm shall be against the Chaldeans. 15 I, even I, have spoken; Yes, I have called him, I have brought him, and his way will prosper. 16 Come ye near unto me, Hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I, and now the Lord God, and his Spirit, hath sent me.