Mark 4:12
in order that seeing they may see, and not know; and hearing they may hear, and not understand; lest they may turn, and their sins may he forgiven unto them.
Mark 8:17-21
And Jesus knowing says to them, Why do you reason because you have not bread? do you not yet know, nor understand? have you your heart still hardened?
Ephesians 2:11
Therefore remember, that when you were Gentiles in the flesh, called Uncircumcision by that which is called Circumcision, made in the flesh with hands;
2 Thessalonians 2:10-12
and in all the deception of unrighteousness to those who perish; because they did not receive the divine love of the truth, that they might be saved.