Bhagavatapurana 1.7.36

1.7.36

mattaṃ pramattam unmattaṃ suptaṃ bālaṃ striyaṃ jaḍam /
prapannaṃ virathaṃ bhītaṃ na ripuṃ hanti dharmavit //

36. For, any one who knows the rule of righteousness does not kill even an enemy if he is intoxicated (not in his senses), unguarded, mad, asleep or young; (nor does he do so) in case it is a dunce or a woman; nor when he has sought protection, lost his chariot, or is in an affrighted condition (running away out of fear).