Matthew 16:21
From that time on Jesus began to show His disciples that He must go to Jerusalem and suffer many things at the hands of the elders, chief priests, and scribes, and that He must be killed and on the third day be raised to life.
What it says
Jesus begins to show that he must go to Jerusalem, suffer from the leaders, be killed, and be raised on the third day.
What it is doing
This verse first states the necessity of the passion and resurrection.
In context
21From that time on Jesus began to show His disciples that He must go to Jerusalem and suffer many things at the hands of the elders, chief priests, and scribes, and that He must be killed and on the third day be raised to life. 22Peter took Him aside and began to rebuke Him. “Far be it from You, Lord!” he said. “This shall never happen to You!” 23But Jesus turned and said to Peter, “Get behind Me, Satan! You are a stumbling block to Me. For you do not have in mind the things of God, but the things of men.”