Bhagavad Gita · 18.51

बुद्ध्या विशुद्धया युक्तो धृत्यात्मानं नियम्य च।शब्दादीन्विषयांस्त्यक्त्वा रागद्वेषौ व्युदस्य च॥

buddhyā viśhuddhayā yukto dhṛityātmānaṁ niyamya cha śhabdādīn viṣhayāṁs tyaktvā rāga-dveṣhau vyudasya cha

Endowed with pure intellect, controlling the self with firmness, turning away from sound and other sense objects, and casting aside attraction and aversion...

— Bhagavad Gita 18.51

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