Luke 9:45

9:45 But they did not understand this statement; its meaning had been concealed from them, so that they could not grasp it. Yet they were afraid to ask him about this statement.

Luke 10:21-24

10:21 On that same occasion Jesus rejoiced in the Holy Spirit and said, “I praise you, Father, Lord of heaven and earth, because you have hidden these things from the wise and intelligent, and revealed them to little children. Yes, Father, for this was your gracious will. 10:22 All things have been given to me by my Father. No one knows who the Son is except the Father, or who the Father is except the Son and anyone to whom the Son decides to reveal him.”

10:23 Then Jesus turned to his disciples and said privately, “Blessed are the eyes that see what you see! 10:24 For I tell you that many prophets and kings longed to see what you see but did not see it, and to hear what you hear but did not hear it.”

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.