Mark 4:12 that'seeing they may see, and not perceive; and hearing they may hear, and not understand; lest perhaps they should turn again, and their sins should be forgiven them.'" (WEB)
Luke 8:10 He said, "To you it is given to know the mysteries of the Kingdom of God, but to the rest in parables; that'seeing they may not see, and hearing they may not understand.' (WEB)