8 But the malignant demon was labouring hard now again to produce such a tragedy. Therefore he impelled Jonathan to the trespass. For if any one of the soldiers had transgressed the law, it seemed to him no great evil that would have been done; but now being insatiate of human ills, and never able to get his fill of our calamities, he thought it would be no grand exploit if he effected only a simple murder. And if he could not also pollute the king's right hand with the murder of his child, he considered that he had achieved no great matter.
And why do I speak of child-murder? For he, the wicked one, thought that by this means he should compass a slaughter even more accursed than that. For if he had sinned wittingly, and been sacrificed, this would only have been child-murder; but now sinning ignorantly, (for he had not heard of the oath), if he had been slain, he would have made the anguish of his father double; for he would have had both to sacrifice a son, and a son who had done no wrong. But now to proceed with the rest of the history; “When he had eaten,” it is said, “His eyes saw clearly.” And here it condemns the king of great folly; showing that hunger had almost blinded the whole army, and diffused much darkness over their eyes.
Afterwards some one of the soldiers, perceiving the action, says, “Your father swore an oath upon all the people, saying, cursed be the man who eats any food today. And the people were faint. And Jonathan said, My father has made away with the land.” What does he mean by the word, “made away with?” Why, that he had ruined, or destroyed them all. Hence, when the oath was transgressed, all kept silence, and no one dared to bring forth the criminal; and this became afterwards no small matter of blame, for not only are those who break an oath, but those also who are privy to it and conceal it, partakers of the crime.
Source: Homilies on the Statues (New Advent)