A person who knows the principles of religion does not kill an enemy who is careless, intoxicated, insane, asleep, afraid or devoid of his chariot. Nor does he kill a boy, a woman, a foolish creature or a surrendered soul.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मत्तं प्रमत्तमुन्मत्तं सुप्तं बालं स्त्रियं जडम् । प्रपन्नं विरथं भीतं न रिपुं हन्ति धर्मवित्
mattaṃ pramattamunmattaṃ suptaṃ bālaṃ striyaṃ jaḍam | prapannaṃ virathaṃ bhītaṃ na ripuṃ hanti dharmavit
SB 1.7.36