Luke 18:34
However, they did not understand a word of this; indeed the saying was hidden from them, and they did not know what he meant.
John 12:16
(His disciples did not understand this at first; but when Jesus was glorified, then they remembered this had been written of him and had happened to him.)
Acts 1:7
But he told them, "It is not for you to know the course and periods of time that the Father has fixed by his own authority.
1 Peter 1:11
the Spirit of messiah within them foretold all the suffering of messiah and his after-glory, and they pondered when or how this was to come;