This verse is from the Bhagavad Gita, Chapter 6, Verse 8. It is written in Sanskrit and translates to English as follows:
jñāna-vijñāna-tṛiptātmā kūṭa-stho vijitendriyaḥ |
yukta ityuchyate yogī sama-loṣhṭāśhma-kāñchanaḥ || 8 ||
"The yogi is said to be integrated when they are satisfied within themselves with the knowledge and wisdom, remaining unshaken like a clod of earth, a stone, or gold, having conquered the senses."
jñāna—knowledge;
vijñāna—realized knowledge, wisdom from within;
tṛipta ātmā—one fully satisfied;
kūṭa-sthaḥ—undisturbed;
vijita-indriyaḥ—one who has conquered the senses;
yuktaḥ—one who is in constant communion with the Supreme;
iti—thus;
uchyate—is said;
yogī—a yogi;
sama—looks equally;
loṣhṭra—pebbles;
aśhma—stone;
kāñchanaḥ—gold