Yoga Sutras of Patanjali · 3.53

जातिलक्षणदेशैरन्यतानवच्छेदात्तुल्ययोस्ततः प्रतिपत्तिः॥५३॥

jāti-lakṣaṇa-deśair anyatā-anavacchedāt tulyayos tataḥ pratipattiḥ

From this discriminative knowledge arises the ability to distinguish between two objects that are identical in species, characteristic, and location.

— Yoga Sutras of Patanjali 3.53

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).