Yoga Sutras of Patanjali · 4.16

न चैकचित्ततन्त्रं वस्तु तदप्रमाणकं तदा किं स्यात्॥१६॥

na caikacittatantraṁ vastu tadapramāṇakaṁ tadā kiṁ syāt

An object does not depend on any single mind; if it did, what would happen when that mind was not perceiving it?

— Yoga Sutras of Patanjali 4.16

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).