Deuteronomy Chapter 31

31:2
And he said unto them, I am an hundred and twenty years old this day; I can no more go out and come in: also the Lord hath said unto me, Thou shalt not go over this Jordan.

31:7-8
And Moses called unto Joshua, and said unto him in the sight of all Israel, Be strong and of a good courage: for thou must go with this people unto the land which the Lord hath sworn unto their fathers to give them; and thou shalt cause them to inherit it.
And the Lord, he it is that doth go before thee; he will be with thee, he will not fail thee, neither forsake thee: fear not, neither be dismayed.