כֹּ֣ה אָֽמַר־יְהוָה֩ גֹּאֵ֨ל יִשְׂרָאֵ֜ל קְדוֹשׁ֗וֹ לִבְזֹה־נֶ֜פֶשׁ לִמְתָ֤עֵֽב גּוֹי֙ לְעֶ֣בֶד מֹשְׁלִ֔ים מְלָכִים֙ יִרְא֣וּ וָקָ֔מוּ שָׂרִ֖ים וְיִֽשְׁתַּחֲוּ֑וּ לְמַ֤עַן יְהוָה֙ אֲשֶׁ֣ר נֶאֱמָ֔ן קְדֹ֥שׁ יִשְׂרָאֵ֖ל וַיִּבְחָרֶֽךָּ׃
Thus saith the LORD, The Redeemer of Israel, his Holy One, To him who is despised of men, To him who is abhorred of nations, To a servant of rulers: Kings shall see and arise, Princes, and they shall prostrate themselves; Because of the LORD that is faithful, Even the Holy One of Israel, who hath chosen thee.
Read halakhic rulings (Jewish law) on Isaiah 49:7: and classical halakhic sources.