Yoga Sutras of Patanjali · 2.34

वितर्का हिंसादयः कृतकारितानुमोदिता लोभक्रोधमोहपूर्वका मृदुमध्याधिमात्रा दुःखाज्ञानानन्तफला इति प्रतिपक्षभावनम् ॥३४॥

vitarkā hiṁsādayaḥ kṛta-kāritānumoditā lobha-krodha-moha-pūrvakā mṛdu-madhyādhimātrā duḥkhājñānānantaphalā iti pratipakṣa-bhāvanam

Perverse thoughts such as violence — whether done, caused, or approved, whether arising from greed, anger, or delusion, whether mild, moderate, or intense — bear endless fruits of pain and ignorance. Therefore, cultivate the opposite.

— Yoga Sutras of Patanjali 2.34

Source: Sanskrit attributed to Patanjali (c. 2nd century BCE – 4th century CE). Public-domain English readings drawn from Swami Vivekananda's 'Raja Yoga' (1896) and Charles Johnston's 'The Yoga Sutras of Patanjali' (1912).