Deuteronomy 31:1-6

1And Moses went and spake these words unto all Israel.

2And he said unto them, I am an hundred and twenty years old this day; I can no more go out and come in: and the LORD hath said unto me, Thou shalt not go over this Jordan.

3The LORD thy God, he will go over before thee; he will destroy these nations from before thee, and thou shalt possess them: and Joshua, he shall go over before thee, as the LORD hath spoken.

4And the LORD shall do unto them as he did to Sihon and to Og, the kings of the Amorites, and unto their land; whom he destroyed.

5And the LORD shall deliver them up before you, and ye shall do unto them according unto all the commandment which I have commanded you.

6Be strong and of a good courage, fear not, nor be affrighted at them: for the LORD thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee.