Joshua 8:3

3 So Y'hoshua set out for 'Ai with all the people who could fight. Y'hoshua chose 30,000 men, the most courageous of his troops, and sent them out by 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 ADONAI said to Y'hoshua, "Don't be afraid or fall into despair! Take all the people who can fight with you, set out, and go up to 'Ai; because now I have handed over to you the king of 'Ai, his people, his city and his land.

2 Do to 'Ai and its king as you did to Yericho and its king; but this time, take its spoil and cattle as booty for yourselves. Ambush the city from behind."

3 So Y'hoshua set out for 'Ai with all the people who could fight. Y'hoshua chose 30,000 men, the most courageous of his troops, and sent them out by night.

4 He instructed them, "You are to lie in wait to ambush the city from behind. Stay close to the city; and all of you, be ready.

5 I and all the troops with me will approach the city; and when they come out to attack us, as they did before, we will run away from them.