After Moses the LORD's servant died, the LORD spoke to Joshua, Nun's son. He had been Moses' helper.
References for Joshua 1:1
“My servant Moses is dead. Now get ready to cross over the Jordan with this entire people to the land that I am going to give to the Israelites.
I am giving you every place where you set foot, exactly as I promised Moses.
Your territory will stretch from the desert and the Lebanon as far as the great Euphrates River, including all Hittite land, up to the Mediterranean Sea on the west.
No one will be able to stand up against you during your lifetime. I will be with you in the same way I was with Moses. I won't desert you or leave you.
Be brave and strong, because you are the one who will help this people take possession of the land, which I pledged to give to their ancestors.
"Be very brave and strong as you carefully obey all of the Instruction that Moses my servant commanded you. Don't deviate even a bit from it, either to the right or left. Then you will have success wherever you go.
Never stop speaking about this Instruction scroll. Recite it day and night so you can carefully obey everything written in it. Then you will accomplish your objectives and you will succeed.
I've commanded you to be brave and strong, haven't I? Don't be alarmed or terrified, because the LORD your God is with you wherever you go."
Then Joshua gave orders to the people's officers:
References for Joshua 1:10