John 2:19-22

2:19 Jesus replied, “Destroy this temple and in three days I will raise it up again.” 2:20 Then the Jewish leaders said to him, “This temple has been under construction for forty-six years, and are you going to raise it up in three days?” 2:21 But Jesus was speaking about the temple of his body. 2:22 So after he was raised from the dead, his disciples remembered that he had said this, and they believed the scripture and the saying that Jesus had spoken.

John 12:16

12:16 (His disciples did not understand these things when they first happened, but when Jesus was glorified, then they remembered that these things were written about him and that these things had happened to him.)

John 14:26

14:26 But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you everything, and will cause you to remember everything I said to you.