Deuteronomy 31:7-8

And Moses called to Joshua and said to him in the sight of all Israel, Be strong, courageous, and firm, for you shall go with this people into the land which the Lord has sworn to their fathers to give them, and you shall cause them to possess it. It is the Lord Who goes before you; He will [march] with you; He will not fail you or let you go or forsake you; [let there be no cowardice or flinching, but] fear not, neither become broken [in spirit–depressed, dismayed, and unnerved with alarm].