מִ֤י עִוֵּר֙ כִּ֣י אִם־עַבְדִּ֔י וְחֵרֵ֖שׁ כְּמַלְאָכִ֣י אֶשְׁלָ֑ח מִ֤י עִוֵּר֙ כִּמְשֻׁלָּ֔ם וְעִוֵּ֖ר כְּעֶ֥בֶד יְהוָֽה׃
Who is blind, but My servant? Or deaf, as My messenger that I send? Who is blind as he that is wholehearted, And blind as the LORD’S servant?
Read halakhic rulings (Jewish law) on Isaiah 42:19: and classical halakhic sources.