In India the custom is to honor any promise made before the Deity. Such a promise cannot be canceled. In Indian villages, whenever there is a quarrel between two parties, they go to a temple to settle the quarrel. Whatever is spoken in front of the Deity is taken to be true, for no one would dare lie before the Deity. This same principle was followed in the Battle of Kurukṣetra.
By not becoming God conscious, human society is deteriorating to the lowest standard of animal life. This Kṛṣṇa consciousness movement is very essential to reviving God consciousness among the general populace. If people actually become God conscious, all quarrels can be settled outside of court.
Ref >> Srila Prabhupada Vani.