Genesis 46:4

I will go down with thee in to Egypt; and I will also surely bring thee up again. His protection would attend their removal, their stay, and the eventual return of the children of Israel. This promise, moreover, was to remind Jacob of the greater and more important prophecy, that of the Messiah, who was to be his descendant. And Joseph shall put his hand upon thine eyes; the last service of love when Jacob closed his eyes in death would be performed by the son whom he had so long mourned as dead.