1 Samuel 14:13-15

13So Jonathan climbed up on his hands and feet, with his armor-bearer behind him. Then they fell before Jonathan, his armor-bearer behind him finishing them off.

14That first assault that Jonathan and his armor-bearer made struck down about 20 men within about half a furrow in an acre of land.

15Terror then spread through the camp, in the field, and among all the troops. Even the outposts and the raiders also trembled, when the earth quaked—it was a trembling from God.