en_tn/jhn/09/02.md

who sinned, this man or his parents ... blind?

This question reflects the ancient Jewish belief that sin caused all illnesses and other deformities. The rabbis also taught that it was possible for a baby to sin while still in the womb. Alternate translation: "Teacher, we know that sin causes a person to be blind. Whose sin caused this man to be born blind? did this man himself sin, or was it his parents who sinned?" (See: rc://en/ta/man/translate/figs-explicit)