John 9:2
And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
Cross-reference
John 9:34
Parallel
In John 9:34, the Pharisees echo the same logic — the healed man is 'steeped in sin at birth' — but now as a hostile accusation.
Luke 13:2
Parallel
Luke 13:2 has Jesus refuting the same assumption that tragedy implies greater sin — a direct teaching parallel to the disciples' question.