After instructing Arjun about meditation, Sri Krishna talks about taking care of the body in chapter 6, verse 16.
nātyaśhnatastu yogo’sti na chaikāntam anaśhnata |na chāti-svapna-śhīlasya jāgrato naiva chārjuna ||
This means, O Arjun, those who eat too much or eat too little, sleep to
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