B.G 6.16
nātyaśnatastu yogo'sti na caikāntamanaśnataḥ। na cātisvapnaśīlasya jāgrato naiva cārjuna ॥16॥
O Arjuna, Yoga is not for one who eats too much, nor for one who does not eat at all; it is not for one who sleeps too much, nor for one who stays awake excessively.
Gīta Bhāshya 6.16
The prohibition of fasting, etc. is for the incapable only. The capable must engage in meditation, abandoning laziness, sleep, eating, and fear.
anaśanādiniṣedhaḥ aśaktasya। uktaṁ hi -
The prohibition of fasting, etc. is for the incapable. It is said:
"nidrāśanabhayaśvāsaceṣṭātandrādivarjanam। kr̥tvā nimīlitākṣastu śakto dhyāyan prasīdati॥"
"The one who is capable of meditating with closed eyes, avoiding laziness, sleep, eating, fear, and breathing activities, becomes successful."
iti nāradīye ॥16॥
-stated thus in the Nārada Purāṇa.