Patanjali Yoga Sutra 2.28

Sanskrit Sutra

योगाङ्गानुष्ठानादशुद्धिक्षये ज्ञानदीप्तिरा विवेकख्यातेः॥२८॥

Swami Vivekananda's translation

By the practice of the different parts of Yogas the impurities being destroyed, knowledge becomes effulgent up to discrimination.

Chapter link: Yoga Sutra Chapter 2