Adam Clarke on 1 Kings 8:31

If any man trespass against his neighbor - Solomon puts here seven cases, in all of which the mercy and intervention of God would be indispensably requisite; and he earnestly bespeaks that mercy and intervention on condition that the people pray towards that holy place, and with a feeling heart make earnest supplication.

The First case is one of doubtfulness; where a man has sustained an injury, and charges it on a suspected person, though not able to bring direct evidence of the fact, the accused is permitted to come before the altar of God, and purge himself by his personal oath. Solomon prays that God may not permit a false oath to be taken, but that he will discover the truth, so that the wicked shall be condemned, and the righteous justified.