Luke 2:50

2:50 Yet his parents did not understand the remark he made to them.

Luke 24:45

24:45 Then he opened their minds so they could understand the scriptures,

Luke 18:34

18:34 But the twelve understood none of these things. This saying was hidden from them, and they did not grasp what Jesus meant.

Luke 8:10

8:10 He said, “You have been given the opportunity to know the secrets of the kingdom of God, but for others they are in parables, so that although they see they may not see, and although they hear they may not understand.