It is said that adversities accrue to a person because of his prarabdha karma; whether he be a dharmik or adharmik person.
In an enmity between such people, if the adharmik person is affected by his prarabdha, should the dharmik one wait for that prarabdha to get over and then destory the enemy? Or should the person continue to destroy the enemy irrespective of prarabdha?
The reason of asking is, because of some kings like Prthviraj Chauhan, who let their mleccha enemies off 16 times, when they were without weapons. Is this dharma? Is this the magnanimity of the king and is such magnanimity greater than his duty of protecting his subjects?
Yes, dharma says to be friendly to everyone. But, if dharmik just meant sitting and preaching, there would be no need for Kshatriyas. Further, prayogas to destroy an enemy would not be mentioned in tantras.
What do dharmashastras/ tantras say with regard to eliminating your enemy when he is facing bad prarabdha? Should you be magnanimous like Prthviraj Chauhan or should you continue to fight even when the enemy is faced with adversity?
Is this like a situation where ordinarily lying is not permitted except for those few circumstances as given in the Manusmriti?
Please note: I would like special focus on the King aspect. Should a king pardon the enemy in war or kill him?
I may consider answers from Non-dharmashastras (Puranas, tantras, etc) but only after a proper explanation.