Patanjali Yoga Sutra 4.7

Sanskrit Sutra

कर्माशुक्लाकृष्णं योगिनस्त्रिविधमितरेषाम्॥७॥

Swami Vivekananda's translation

Works are neither black nor white for the Yogis; for others they are threefold — black, white, and mixed.

Chapter link: Yoga Sutra Chapter 4