Evidence 1:
The Lord said unto my Lord, Sit thou at my right hand, until I make thine enemies thy footstool. Psa 110:1
We see a messianic prophecy where God addressing Messiah whom David calls as Lord.
Evidence 2:
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. Isa 48:16
Jesus speaking here as the one who speaks from the beginning. He says God and His Spirit has sent Him.
Evidence 3:
And the Lord God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever: Gen 3:22
God speaking about man who became like one of them (plural).
Evidence 4:
For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace. Isa 9:6
Another messianic prophecy where Messiah is called as both everlasting Father and mighty God.
Evidence 5:
But thou, Beth–lehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting. Micah 5:2
Messiah is from eternity who had no beginning.
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