Bhagavad Gita 8.11

यदक्षरं वेदविदो वदन्ति विशन्ति यद्यतयो वीतरागा: |
यदिच्छन्तो ब्रह्मचर्यं चरन्ति तत्ते पदं संग्रहेन प्रवक्षये

Translation

Scholars of the Vedas describe Him as Imperishable; great ascetics practice the vow of celibacy and renounce worldly pleasures to enter into Him. I shall now explain to you briefly the path to that goal.