Deuteronomy 31: 1 - 8
1 So Moses continued to speak these words to all Israel.
2 And he said to them, "I am a hundred and twenty years old this day; I am no longer able to go out and come in. The LORD has said to me, `You shall not go over this Jordan.'
3 The LORD your God himself will go over before you; he will destroy these nations before you, so that you shall dispossess them; and Joshua will go over at your head, as the LORD has spoken.
4 And the LORD will do to them as he did to Sihon and Og, the kings of the Amorites, and to their land, when he destroyed them.
5 And the LORD will give them over to you, and you shall do to them according to all the commandment which I have commanded you.
6 Be strong and of good courage, do not fear or be in dread of them: for it is the LORD your God who goes with you; he will not fail you or forsake you."
7 Then Moses summoned Joshua, and said to him in the sight of all Israel, "Be strong and of good courage; for you shall go with this people into the land which the LORD has sworn to their fathers to give them; and you shall put them in possession of it.
8 It is the LORD who goes before you; he will be with you, he will not fail you or forsake you; do not fear or be dismayed."

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