Deuteronomy 31:6-7

LXX2012(i) 6 Be courageous and strong, fear not, neither be cowardly neither be afraid before them; for [it is] the Lord your God that advances with you in the midst of you, neither will he by any means forsake you, nor desert you. 7 And Moses called Joshua, and said to him before all Israel, Be courageous and strong; for you shall go in before this people into the land which the Lord sware to your fathers to give to them, and you shall give it to them for an inheritance.