Bhagavad Gita · 8.11

यदक्षरं वेदविदो वदन्तिविशन्ति यद्यतयो वीतरागाः।यदिच्छन्तो ब्रह्मचर्यं चरन्तितत्ते पदं संग्रहेण प्रवक्ष्ये॥

yad akṣharaṁ veda-vido vadanti viśhanti yad yatayo vīta-rāgāḥ yad ichchhanto brahmacharyaṁ charanti tat te padaṁ saṅgraheṇa pravakṣhye

That which the knowers of the Vedas call the imperishable, which the ascetics free from passion enter, and desiring which they practice celibacy — that goal I shall briefly explain to you.

— Bhagavad Gita 8.11

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