I Samuel 14:24, 28

And the men of Israel were distressed that day, for Saul had placed the people under oath, saying, “Cursed is the man who eats any food until evening, before I have taken vengeance on my enemies.” So none of the people tasted food.

Then one of the people said, “Your father strictly charged the people with an oath, saying, ‘Cursed is the man who eats food this day.’ ” And the people were faint.