Bhagavad Gita · 6.8

ज्ञानविज्ञानतृप्तात्मा कूटस्थो विजितेन्द्रियः।युक्त इत्युच्यते योगी समलोष्टाश्मकाञ्चनः॥

jñāna-vijñāna-tṛptātmā kūṭa-stho vijitendriyaḥ yukta ity uchyate yogī sama-loṣhṭāśhma-kāñchanaḥ

The yogi who is satisfied with knowledge and realized wisdom, who is unwavering and master of the senses, and who looks upon a clod of earth, a stone, and gold with equal vision — such a person is said to be truly united.

— Bhagavad Gita 6.8

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)