וַיַּ֨עַל כַּיּוֹנֵ֜ק לְפָנָ֗יו וְכַשֹּׁ֙רֶשׁ֙ מֵאֶ֣רֶץ צִיָּ֔ה לֹא־תֹ֥אַר ל֖וֹ וְלֹ֣א הָדָ֑ר וְנִרְאֵ֥הוּ וְלֹֽא־מַרְאֶ֖ה וְנֶחְמְדֵֽהוּ׃
For he shot up right forth as a sapling, And as a root out of a dry ground; He had no form nor comeliness, that we should look upon him, Nor beauty that we should delight in him.
Read midrashic interpretation of Isaiah 53:2: and classical rabbinic exegesis.