So Joshua and the whole army set out to attack Ai. Joshua chose 30,000 mighty men of valor and sent them out at night
KJV
So Joshua arose, and all the people of war, to go up against Ai: and Joshua chose out thirty thousand mighty men of valour, and sent them away by night.
ASV
So Joshua arose, and all the people of war, to go up to Ai: and Joshua chose out thirty thousand men, the mighty men of valor, and sent them forth by night.