Bhagavad Gita 6.14

प्रशांतात्मा अतीतभिर्ब्रह्मचारिवृते स्थित: |
मन: संयम्य मच्छित्टो युक्त असित मत्पर:

Translation

Thus, with a serene, fearless, and unwavering mind, and staunch in the vow of celibacy, the vigilant yogi should meditate on Me, having Me alone as the supreme goal.