Ramayana 2.64.24

क्षत्रियेण वधो राजन् वानप्रस्थे विशेषतः।ज्ञानपूर्वं कृत स्स्थानाच्च्यावयेदपि वज्रिणम्।।।।

kṣatriyeṇa vadho rājan vānaprasthe viśeṣataḥ | jñānapūrvaṃ kṛtaḥ sthānāc cyāvayed api vajriṇam ||

O King, a killing done by a kṣatriya—especially of a forest-dweller—when committed knowingly, can unseat even Vajrin (Indra) from his station.