Deuteronomy 31:3-8

Jehovah thy God, he will go over before thee; he will destroy these nations from before thee, and thou shalt dispossess them: and Joshua, he shall go over before thee, as Jehovah hath spoken. And Jehovah will do unto them as he did to Sihon and to Og, the kings of the Amorites, and unto their land; whom he destroyed. And Jehovah will deliver them up before you, and ye shall do unto them according unto all the commandment which I have commanded you. Be strong and of good courage, fear not, nor be affrighted at them: for Jehovah thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee. And Moses called unto Joshua, and said unto him in the sight of all Israel, Be strong and of good courage: for thou shalt 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. And Jehovah, 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.