Bhagavad Gita · 6.16

नात्यश्नतस्तु योगोऽस्ति न चैकान्तमनश्नतः।न चातिस्वप्नशीलस्य जाग्रतो नैव चार्जुन॥

nātyaśhnatas tu yogo 'sti na chaikāntam anaśhnataḥ na chāti-svapna-śhīlasya jāgrato naiva chārjuna

Yoga is not for one who eats too much or too little, nor for one who sleeps too much or stays awake too much, O Arjuna.

— Bhagavad Gita 6.16

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)