Yoga Sutras of Patanjali · 4.7

कर्माशुक्लाकृष्णं योगिनस्त्रिविधमितरेषाम्॥७॥

karmāśuklākṛṣṇaṁ yoginas trividham itareṣām

The karma of a yogi is neither white nor black; for others, it is of three kinds — white, black, and mixed.

— Yoga Sutras of Patanjali 4.7

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).