principles

A person who knows the principles of religion does not kill an enemy who is 

1. careless, 
2. intoxicated, 
3. insane, 
4. asleep, 
5. afraid or 
6. devoid of his chariot. 

Nor does he kill 

1. a boy, 
2. a woman, 
3. a foolish creature or 
4. a surrendered soul.

https://vedabase.io/en/library/sb/1/7/