“On the way, Jesus told them, “Tonight all of you will desert me. For the Scriptures say, ‘God will strike the Shepherd, and the sheep of the flock will be scattered.’”
Matthew 26:31 NLT
The scripture in which Jesus is referring to is
Zechariah 13:7 and it says
““Awake, O sword, against my shepherd, the man who is my partner,” says the Lord of Heaven’s Armies. “Strike down the shepherd, and the sheep will be scattered, and I will turn against the lambs.”
Now when Jesus tells this to Peter he is telling him that once he is crucified all the disciples will scatter from each other
“But after I have been raised from the dead, I will go ahead of you to Galilee and meet you there.””
Matthew 26:32 NLT
Jesus is letting them know that he will be raised from the dead and meet them in Galilee he’s telling them what will happen after he is crucified.
“The women ran quickly from the tomb. They were very frightened but also filled with great joy, and they rushed to give the disciples the angel’s message. And as they went, Jesus met them and greeted them. And they ran to him, grasped his feet, and worshiped him. Then Jesus said to them, “Don’t be afraid! Go tell my brothers to leave for Galilee, and they will see me there.””
Matthew 28:8-10 NLT
This is where Jesus is telling Mary Madeline and the other Mary to tell his brothers who are the disciples to start to leave for Galilee and they will see him there.