The Messiah would be God's servant.
OT Prophecy NT Fulfillment
Isaiah 49:5a
"And now, saith the LORD that formed me from the womb to be his servant, to bring Jacob again to him, Though Israel be not gathered, yet shall I be glorious in the eyes of the LORD, and my God shall be my strength."
John 6:38
"For I came down from heaven, not to do mine own will, but the will of him that sent me."

John 8:29
"And he that sent me is with me: the Father hath not left me alone; for I do always those things that please him."
Tanakh – Neviim – Isaiah 49:5a
"And now saith HaShem that formed me from the womb to be His servant, to bring Jacob back to Him, and that Israel be gathered unto Him—for I am honourable in the eyes of HaShem, and my G-d is become my strength—"
Hebrew OT – Isaiah 49:5a
[49:5] וְעַתָּה אָמַר יְהוָה
יֹצְרִי מִבֶּטֶן לְעֶבֶד לוֹ
לְשׁוֹבֵב יַעֲקֹב אֵלָיו
וְיִשְׂרָאֵל לֹא יֵאָסֵף
וָאֶכָּבֵד בְּעֵינֵי יְהוָה
וֵאלֹהַי הָיָה עֻזִּי