Joshua therefore came unto them suddenly, and went up from Gilgal all night.

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

And when they had set the people, even all the host that was on the north of the city, and those lying in wait on the west of the city, Joshua went that night into the midst of the valley.

This book of the law shall not depart out of your mouth; but you shall meditate therein 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.