Allah O Muhammad -in His infinite mercy has presented to your mind in your sleep the troops of the infidels as being some few- at the psychologically appropriate moment in which your minds were in actual expectation of war to happen. Had He presented them to you in your vision as being multitudinous you would have been smitten with mental anguish and dismay and you would have fallen into dispute, but Allah saved the situation; He is 'Alimun of all that is brewed secretly in the breasts.