Bhagavad Gita Chapter 6 Verse 16
भगवद् गीता अध्याय 6 श्लोक 16

नात्यश्नतस्तु योगोऽस्ति न चैकान्तमनश्नतः।
न चातिस्वप्नशीलस्य जाग्रतो नैव चार्जुन।।6.16।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।6.16।। परन्तु हे अर्जुन  यह योग उस पुरुष के लिए सम्भव नहीं होता जो अधिक खाने वाला है या बिल्कुल न खाने वाला है तथा जो अधिक सोने वाला है या सदा जागने वाला है।।


Brahma Vaishnava Sampradaya - Commentary





Abstention from performing regulatory fasting such as Ekadasi which  is  the
11th day of the waxing or waning moon is sanctioned only for  the  weak  and
invalid.  In the Narada Purana it states: That  one  who  is  strong  having
given up sleep, food, fear, lethargy and actions, meditates  within  on  the
Supreme Lord Krishna or His authorised incarnations  with  eyes  half-closed
focused on the tip of the nose or the space  between  the  eyebrows  attains
equanimity of mind.