Matthew 28:16

‘But the eleven disciples went into Galilee, to the mountain where Jesus had appointed them.'

In accordance with Jesus instructions the eleven Apostles finally went into Galilee to find new truth, in total contrast with the soldiers who had gone to the Chief Priests to be taught lies. And there they went to the mountain that Jesus ‘had appointed them'. This would suggest that prior to His death He had already tried to make arrangements for them to go to Galilee as soon as He was dead, and had given them details about where they would see Him once they did so (although the arrangement might have been made during His resurrection appearances in Jerusalem). Compare Matthew 26:32. But until they had heard what the women had to say it is clear that this had slipped into the background of their memories. But now that they knew that Jesus was indeed risen they obeyed His words. This appearance in Galilee, and the giving of Jesus' commission there, were important. They indicate that Jesus' work in Galilee and the surrounding area must go on, and that what is to go forward is based on that. Was this the mountain on which He proclaimed the teaching in the Sermon on the Mount, or the mountain on which He fed the five thousand? (Matthew 5:1; Matthew 15:29). Or did He have in mind the elders who had gone into the mountain with Moses and Aaron, to enjoy the presence of God? (Exodus 24:1). We just do not know. But we do know that He was fond of teaching in mountains because it meant getting away from the general crowds.