1 Samuel 14:44

God do so, etc. Again Saul takes an oath to put Jonathan to death, supposing himself bound by his former words. But he must have been pained beyond measure at the miserable consequences of his rashness, and have bitterly reproached himself for thus twice marring the happiness of the day by unhallowed oaths. Jonathan's trespass, committed unwittingly, required nothing more than a trespass offering for its expiation, nor did the silence of the Urim and Thummim imply any fault in him. The fault lay in Saul having imposed an oath upon the army; that oath had been broken, and a formal expiation must be made. But Saul was by nature a despot, and could endure nothing that seemed even for the moment to stand in his way.