John 9:36

He answered and said, Who is he, Lord, that I might believe on him?

Cross-reference

John 9:39 Parallel

John 9:39 explains Jesus' mission to give sight to the blind and blind those who see, directly following the healing and the blind man's question.

Proverbs 30:4 asks about God's name and his son's name, directly paralleling the blind man's question 'Who is he?' about the Son of Man.