'Oath' in the Bible

Now the men of Israel were hard-pressed on that day, for Saul had put the people under oath, saying, “Cursed be the man who eats food before evening, and until I have avenged myself on my enemies.” So none of the people tasted food.

When the people entered the forest, behold, there was a flow of honey; but no man put his hand to his mouth, for the people feared the oath.

But Jonathan had not heard when his father put the people under oath; therefore, he put out the end of the staff that was in his hand and dipped it in the honeycomb, and put his hand to his mouth, and his eyes brightened.

Then one of the people said, “Your father strictly put the people under oath, saying, ‘Cursed be the man who eats food today.’” And the people were weary.