So on the day of the battle no sword or spear was to be found in the hand of anyone in the army that was with Saul and Jonathan. No one but Saul and his son Jonathan had them.
Therefore he told me, “These signify the word of the Lord to Zerubbabel: ‘Not by strength and not by power, but by my Spirit,’ says the Lord who rules over all.”
God chose new leaders, then fighters appeared in the city gates; but, I swear, not a shield or spear could be found, among forty military units in Israel.
They charged two-thirds of a shekel to sharpen plowshares and cutting instruments, and a third of a shekel to sharpen picks and axes, and to set ox goads.
and all this assembly will know that it is not by sword or spear that the Lord saves! For the battle is the Lord’s, and he will deliver you into our hand.”
David prevailed over the Philistine with just the sling and the stone. He struck down the Philistine and killed him. David did not even have a sword in his hand.