Deuteronomy 31:5

1 When Moses had finished speaking these words to all Israel,

2 he said to them, “I am now a hundred and twenty years old; I am no longer able to come and go, and the LORD has said to me, ‘You shall not cross the Jordan.’

3 The LORD your God Himself will cross over ahead of you. He will destroy these nations before you, and you will dispossess them. Joshua will cross ahead of you, as the LORD has said.

4 And the LORD will do to them as He did to Sihon and Og, the kings of the Amorites, when He destroyed them along with their land.

5 The LORD will deliver them over to you, and you must do to them exactly as I have commanded you.

6 Be strong and courageous; do not be afraid or terrified of them, for it is the LORD your God who goes with you; He will never leave you nor forsake you.”

7 Then Moses called for Joshua and said to him in the presence of all Israel, “Be strong and courageous, for you will go with this people into the land that the LORD swore to their fathers to give them, and you shall give it to them as an inheritance.

8 The LORD Himself goes before you; He will be with you. He will never leave you nor forsake you. Do not be afraid or discouraged.”

9 So Moses wrote down this law and gave it to the priests, the sons of Levi, who carried the ark of the covenant of the LORD, and to all the elders of Israel.

Read all of Deuteronomy 31