Bhagavad Gita 6.16

नात्यश्नतस्तु योगोऽस्ति न चैकान्तमनश्नत: |
न चाति स्वप्नशीलस्य जाग्रतो नैव चार्जुन

Translation

O Arjun, those who eat too much or too little, sleep too much or too little, cannot attain success in Yog.