Patanjali Yoga Sutra 4.23

Sanskrit Sutra

तदसंख्येयवासनाभिश्चित्रमपि परार्थं संहत्यकारित्वात्॥२३॥

Swami Vivekananda's translation

The mind, though variegated by innumerable desires, acts for another (the Purusha), because it acts in combination.

Chapter link: Yoga Sutra Chapter 4