The Messiah would be God.
OT Prophecy NT Fulfillment
Psalm 45:6–7b
[6] Thy throne, O God, is for ever and ever: the sceptre of thy kingdom is a right sceptre.
[7] Thou lovest righteousness, and hatest wickedness: therefore God, thy God, hath anointed thee with the oil of gladness above thy fellows.
Hebrews 1:8–9
[8] But unto the Son he saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.
[9] Thou hast loved righteousness, and hated iniquity; therefore God, even thy God, hath anointed thee with the oil of gladness above thy fellows.
Tanakh – Ketuvim – Psalms 45:7–8b
[7] Thy throne given of G-d is for ever and ever; a sceptre of equity is the sceptre of thy kingdom.
[8] Thou hast loved righteousness, and hated wickedness; therefore G-d, thy G-d, hath anointed thee with the oil of gladness above thy fellows.
Hebrew OT – Psalms 45:7–8b
[45:7] כִּסְאֲךָ אֱלֹהִים עוֹלָם וָעֶד
שֵׁבֶט מִישׁוֹר שֵׁבֶט מַלְכוּתֶךָ
[45:8] אָהַבְתָּ צֶדֶק וַתִּשְׂנָא רֶשַׁע
עַל־כֵּן מְשָׁחֲךָ אֱלֹהִים אֱלֹהֶיךָ
שֶׁמֶן שָׂשׂוֹן מֵחֲבֵרֶיךָ