(23) Shall not go up.--The enemy, on the same battle-expound, would have prepared for attack from the same direction as before; consequently David is directed to go round them and attack them unexpectedly from the opposite quarter.

Verse 23. - Thou shalt not go up. The attack in front is forbidden, and the answer shows that the priest with the ephod did more than give a mere affirmative or negative reply. For David receives full instructions. Taking advantage of the valleys, he is to creep round into the rear of the Philistines, and approach them under cover of a thicket of baca trees. Mulberry trees; Hebrew, baca trees. This suggests the idea that David's place of attack was the Baca valley (Psalm 84:6), and that there was such a valley, though this is not certain. For the Revised Version translates "valley of weeping," concluding that baca is not there a proper name. By baca trees the LXX. and Vulgate "pear trees," but as bacah means "to weep," it is probably some balsamic shrub, from which a resin exudes. The Revised Version puts here in the margin, "balsam trees." Dr. Tristram thinks it was a sort of aspen, but the authority of the Vulgate is great in such matters, as Jerome obtained his information in Palestine itself.

5:17-25 The Philistines considered not that David had the presence of God with him, which Saul had forfeited and lost. The kingdom of the Messiah, as soon as it was set up in the world, was thus attacked by the powers of darkness. The heathen raged, and the kings of the earth set themselves to oppose it; but all in vain, Ps 2:1, &c. The destruction will turn, as this did, upon Satan's own kingdom. David owns dependence on God for victory; and refers himself to the good pleasure of God, Wilt thou do it? The assurance God has given us of victory over our spiritual enemies, should encourage us in our spiritual conflicts. David waited till God moved; he stirred then, but not till then. He was trained up in dependence on God and his providence. God performed his promise, and David failed not to improve his advantages. When the kingdom of the Messiah was to be set up, the apostles, who were to beat down the devil's kingdom, must not attempt any thing till they received the promise of the Spirit; who came with a sound from heaven, as of a rushing, mighty wind, Ac 2:2.And when David inquired of the Lord,.... For though he had success before, and got the victory, he would not engage again with them without having the mind and will of God, on whom he knew victory alone depended:

he said, thou shalt not go up; that is, directly, and in a straight line:

but fetch a compass behind them; and get to the rear of them, instead of falling upon them in the front:

and come upon them over against the mulberry trees: which grew in the valley of Rephaim, and near where the Philistines had pitched.