Patanjali Yoga Sutra 2.34

Sanskrit Sutra

वितर्का हिंसादयः कृतकारितानुमोदिता लोभक्रोधमोहपूर्वका मृदुमध्याधिमात्रा दुःखाज्ञानानन्तफला इति प्रतिपक्षभावनम्॥३४॥

Swami Vivekananda's translation

The obstructions to Yoga are killing, falsehood, etc., whether committed, caused, or approved; either through avarice, or anger, or ignorance; whether slight, middling, or great; and they result in infinite ignorance and misery. This is (the method of) thinking the contrary.

Chapter link: Yoga Sutra Chapter 2