This book of the law shall not depart out of your mouth, but you shall meditate on it day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.

So Joshua arose, and all the people of war, to go up to Ai. Joshua chose thirty thousand men, the mighty men of valor, and sent them out by night.

Joshua sent them out; and they went to set up the ambush, and stayed between Bethel and Ai, on the west side of Ai; but Joshua stayed among the people that night.

So they set the people, even all the army who was on the north of the city, and their ambush on the west of the city; and Joshua went that night into the midst of the valley.

Joshua therefore came on them suddenly. He went up from Gilgal all night.