The Messiah would speak with God given knowledge.
OT Prophecy NT Fulfillment
Isaiah 50:4
"The LORD God hath given me the tongue of the learned, that I should know how to speak a word in season to him that is weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned."
John 12:49
"For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak.  And I know that his commandment is life everlasting: whatsoever I speak therefore, even as the Father said unto me, so I speak."
Matthew 7:28-29
"[28] And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine: [29] For he taught them as one having authority, and not as the scribes."

Tanakh - Neviim - Isaiah 50:4

"The L-rd GOD hath given me the tongue of them that are taught, that I should know how to sustain with words him that is weary; He wakeneth morning by morning, He wakeneth mine ear to hear as they that are taught."

 Hebrew OT - Isaiah 50:4

רבד ףעי-תא תועל תעדל םידומל ןושל יל ןתנ הוהי ינדא
.םידומלכ עמשל ןזא יל ריעי רקבב רקבב ריעי

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