66.

God forces the Philistines to kill each other

After helping Jonathan with his first slaughter (which wasn't really his first, but Oh well), God took over the killing himself. He didn't have much choice if he wanted to get the killing done, because there were only two swords in all Israel at the time, Jonathan's and Saul's. And it's hard to kill Philistines with only sticks and stones.

So it came to pass in the day of battle, that there was neither sword nor spear found in the hand of any of the people that were with Saul and Jonathan: but with Saul and with Jonathan his son was there found. 1 Samuel 13:22

But God had a plan. He'd force the Philistines to kill each other (and throw in an earthquake for dramatic effect).

And there was trembling ... and the earth quaked: so it was a very great trembling. ...

The multitude melted away, and they went on beating down one another... Every man's sword was against his fellow, and there was a very great discomfiture. 14:15-20

After the Philistines killed each other, the Israelites must have gathered up their swords and spears, because by the end of the same chapter Saul is fighting everybody at once, "vexing" them all.

So Saul ... fought against all his enemies on every side, against Moab, and against the children of Ammon, and against Edom, and against the kings of Zobah, and against the Philistines: and whithersoever he turned himself, he vexed them. And he gathered an host, and smote the Amalekites, and delivered Israel out of the hands of them that spoiled them. 14:47-48

(I guessed that God forced 1000 Philistines to kill each other. But since the Bible doesn't say that God was involved in the second killing, I didn't include it on the official list.)