All the more cause, then, for David to hate Goliath and determine to annihilate him. His father encouraged him to oppose Goliath, for he considered it David's duty to protect Saul the Benjamite against the giant, as Judah, his ancestor, had in ancient days pledged himself for the safety of Benjamin, the ancestor of Saul. For Goliath was intent upon doing away with Saul. His grievance against him was that once, when, in a skirmish between the Philistines and the Israelites, Goliath had succeeded in capturing the holy tables of the law, Saul had wrested them from the giant.
In consequence of his malady, Saul could not venture to cross swords with Goliath, and he accepted David's offer to enter into combat in his place. David put on Saul's armor, and when it appeared that the armor of the powerfully-built king fitted the erstwhile slender youth, Saul recognized that David had been predestined for the serious task he was about to undertake, but at the same time David's miraculous transformation did not fail to arouse his jealousy.
David, for this reason, declined to array himself as a warrior for his contest with Goliath. He wanted to meet him as a simple shepherd. Five pebbles came to David of their own accord, and when he touched them, they all turned into one pebble. The five pebbles stood for God, the three Patriarchs, and Aaron. Hophni and Phinehas, the descendants of the last, had only a short time before been killed by Goliath.