16
When people make promises, they guarantee them by appeal to some authority above them so that if there is any question that they'll make good on the promise, the authority will back them up.
16
People always use the name of someone greater than themselves when they swear. The oath proves that what they say is true, and this ends all arguing.
16
For men swear by a greater than themselves, and the end of all their plea [and the end of all their controversy, or debate,] is an oath to confirmation.