1 Samuel 14:14-18

And that first slaughter, which Jonathan and his armourbearer made, was about twenty men, within as it were an half acre of land, which a yoke of oxen might plow.

And there was trembling in the host, in the field, and among all the people: the garrison, and the spoilers, they also trembled, and the earth quaked: so it was a very great trembling.

And the watchmen of Saul in Gibeah of Benjamin looked; and, behold, the multitude melted away, and they went on beating down one another.

Then said Saul unto the people that were with him, Number now, and see who is gone from us. And when they had numbered, behold, Jonathan and his armourbearer were not there.

And Saul said unto Ahiah, Bring hither the ark of God. For the ark of God was at that time with the children of Israel.