1 Samuel 14:13-15

13Then Jonathan climbed up on his hands and feet, with his armor bearer behind him; and they fell before Jonathan, and his armor bearer put some to death after him. 14That first slaughter which Jonathan and his armor bearer made was about twenty men within about half a furrow in an acre of land. 15And there was a trembling in the camp, in the field, and among all the people. Even the garrison and 1the raiders trembled, and 2the earth quaked so 3that it became a 4great trembling.