Then they remembered what he'd said.
When they returned from the tomb they reported all that had happened to the eleven disciples and to all the others.
At the time, Jesus' disciples did not understand what these things meant. It was only later when he was glorified that they realized what had happened had been prophesied and applied to him.
But when the Father sends the Comforter, the Holy Spirit, in my place, he will teach you everything and remind you of all that I told you.