1 Samuel 14:24, 28

But the men of Israel were hard-pressed that day, because Saul had put the people under a curse, saying, “Cursed be the man who eats food before evening, and before I have taken vengeance on my enemies.” So none of the people ate any food.

But one of the people told him, “Your father strictly put the people under an oath, saying, ‘Cursed be the man who eats food today.’ ” And the people were exhausted [and hungry].