Joshua 8:3

3 So Joshua and the whole army moved out to attack Ai. He chose 30,000 of his best fighting men. He sent them out at night.

Joshua 8:3 Meaning and Commentary

Joshua 8:3

So Joshua arose, and all the people of war, to go up against
Ai
As the Lord had commanded him:

and Joshua chose out thirty thousand mighty men of valour;
out of all the men of war; these were a select company, picked men, not the whole army, as some have thought, for he was ordered to take all the people of war, as he did:

and sent them away by night;
from the main army, that they might pass the city and get behind it undiscovered, for they were sent for an ambush; and of these some were to take the city, and be left in it to burn it, and some to smite the men of Ai, as Abarbinel notes.

Joshua 8:3 In-Context

1 Then the LORD spoke to Joshua. He said, "Do not be afraid. Do not lose hope. Go up and attack Ai. Take the whole army with you. I have handed the king of Ai over to you. I have given you his people, his city and his land.

2 "Remember what you did to Jericho and its king. You will do the same thing to Ai and its king. But this time you can keep for yourselves the livestock and everything else you take from them. Have some of your fighting men hide behind the city and take them by surprise."

3 So Joshua and the whole army moved out to attack Ai. He chose 30,000 of his best fighting men. He sent them out at night.

4 He gave them orders. He said, "Listen carefully to what I'm saying. You must hide behind the city. Don't go very far away from it. All of you must be ready to attack it.

5 "I and all of the men who are with me will go up to the city. The men of Ai will come out to fight against us, just as they did before. Then we'll run away from them.