Deuteronomy 31:7-8

7And Moses called to Joshua, and said to him in the sight of all Israel, Be strong and courageous, for thou must go with this people into the land which Jehovah hath sworn unto their fathers to give them; and thou shalt cause them to inherit it.

8And Jehovah, he it is that goeth before thee: he will be with thee; he will not leave thee, nor forsake thee; fear not, neither be dismayed.