וְאָב֤וֹאָה ׀ אֶל־מִזְבַּ֬ח אֱלֹהִ֗ים אֶל־אֵל֮ שִׂמְחַ֪ת גִּ֫ילִ֥י וְאוֹדְךָ֥ בְכִנּ֗וֹר אֱלֹהִ֥ים אֱלֹהָֽי׃
Then will I go unto the altar of God, unto God, my exceeding joy; And praise Thee upon the harp, O God, my God.
Read midrashic interpretation of Psalms 43:4: and classical rabbinic exegesis.