Jesus began to teach the disciples about his coming death and resurrection.

Matthew 16:21-23

21 From that time Jesus began to teach us disciples that it was necessary for him to go to Jerusalem city. There the ruling elders, the chief priests, and the men who taught the Jewish laws would cause him to suffer and ◄be killed/die►. Then on the third day after that, he would become alive again. 22 Because Peter assumed that the Messiah would not suffer and die, he took Jesus aside and began to rebuke him for talking about suffering and dying. He said, “Lord, may God never permit that to happen to you! That must certainly not happen!” 23 Then Jesus turned to look at Peter, and he said to him, “Stop talking to me like that [MTY]! Stop saying what Satan [MET] would say, and stop trying to prevent from happening what God has planned! You are a hindrance to me, because you are not thinking like God thinks. Instead, you are thinking like people think!”