Bhagwad Gita
Chapter 8, Verse 11
यदक्षरं वेदविदो वदन्ति
विशन्ति यद्यतयो वीतरागाः।
यदिच्छन्तो ब्रह्मचर्यं चरन्ति
तत्ते पदं संग्रहेण प्रवक्ष्ये।।8.11।।
Persons learned in the Vedas, who utter omkara and who are great sages in the renounced order, enter into Brahman. Desiring such perfection, one practices celibacy. I shall now explain to you this process by which one may attain salvation.