6:16  

नात्यश्नतस्तु योगोऽस्ति न चैकान्तमनश्नतः ।
न चाति स्वप्नशीलस्य जाग्रतो नैव चार्जुन ॥६- १६॥

naatyashnatastu yogo'sti na chaikaantamanashnataH ।

na chaati swapnashiilasya jaagrato naiwa chaarjuna ॥६- १६॥

Source: Automatic ITRANS Transliteration

This yoga is not possible, O Arjuna, for the one who eats too much, or who does not eat at all; who sleeps too much, or who keeps awake.

Source: The Bhagavad-Gita: The Sacred Song

There is no possibility of one's becoming a yogi, O Arjuna, if one eats too much, or eats too little, sleeps too much or does not sleep enough.

Source: Bhagavad Gita As It Is