(13) Joshua went that night into the. . . . valley (Emek).--Not the ravine (or Gai) before mentioned (Joshua 8:11), but a wider and more open part of the valley, probably a little further to the south;� the object being to draw the men of Ai into a pursuit in the direction of the road to Gilgal.

Verse 13. - And when they had set. This may mean the leaders of the detachment of 30,000. Joshua does not appear to have been with them, for he is not mentioned till the latter part of the verse (see note on ver. 3). Joshua went that night. Having made all his dispositions, he descended in the evening from his vantage ground on the hill into the plain, so as to invite attack in the morning, a stratagem which (see next verse) was completely successful. Some MSS., however, have וַיָּלֶן "and he rested," for וַיֵּלֶך "and he went" here. The valley. The word here is עֶמֶק not גָי as in ver. 11. Therefore the narrow waterless ravine in which the troops in ambush were to lie hid is not meant here, but a wider valley. A consideration of this fact might do something to settle the much disputed question of the situation of Ai. The עֶמֶק though deep, as the name implies, was a valley large enough for cultivation or luxuriant vegetation (Job 39:10; Psalm 65:14; Song of Solomon 2:1). Even a battle might be fought there (Job 39:21). Such a valley as that of Chamonix or Lauterbrunnen would answer to the description, and so would the passes of Glencoe and Killiecrankie.

8:3-22 Observe Joshua's conduct and prudence. Those that would maintain their spiritual conflicts must not love their ease. Probably he went into the valley alone, to pray to God for a blessing, and he did not seek in vain. He never drew back till the work was done. Those that have stretched out their hands against their spiritual enemies, must never draw them back.And when they had set the people,.... In battle array, as in 1 Kings 20:12; that is, Joshua and the officers of the army:

even all the host that was on the north of the city; where Joshua and the main army were:

and the liers in wait on the west of the city: both the first and second ambush; when all, were prepared and got ready by their several officers, to act the part they were to do:

Joshua went that night into the midst of the valley; according to Ben Gersom, to see whether the guards or sentinels which were placed there were awake or asleep, lest the men of Ai should come suddenly upon them and smite them; but perhaps it might be to pray and meditate.