'Adjured' in the Bible

And the men of Israel were distressed that day: for Saul had adjured the people, saying, Cursed be the man that eateth any food until evening, that I may be avenged on mine enemies. So none of the people tasted any food.

But Jonathan had not heard when his father adjured the people; and he put forth the end of his staff which was in his hand, and dipped it in the honeycomb, and put his hand to his mouth, and his eyes became bright.

And a man of the people answereth and saith, 'Thy father certainly adjured the people, saying, Cursed is the man who eateth food to-day; and the people are weary.'