1 Samuel 14:13

Upon his hands and upon his feet. Of course a single stone rolled down upon them while thus clambering up the precipitous side of the cliff would have sent them to the bottom; but the Philistines, apparently considering the ascent impossible, seem entirely to have neglected them. The youthful appearance of the two no doubt contributed to throw them off their guard. And they fell before Jonathan. The brevity of the Hebrew very well expresses the rapidity of Jonathan's action. Used to mountaineering, he was ready, as soon as he had reached the summit, to commence the attack, and the Philistines, little expecting so vigorous an onslaught from so feeble a force, were surprised, and made but a slight resistance. The armour bearer also behaved with a bravery like his master's.