Mahabharata 13.110.93

त्रयोविंशे तु दिवसे प्राशेद्यस्त्वेकभोजनम्सदा द्वादश मासांस्तु मिताहारो जितेन्द्रियः

trayoviṃśe tu divase prāśedyastvekabhojanamsadā dvādaśa māsāṃstu mitāhāro jitendriyaḥ

Our plain-language meaning of this verse is waiting for scholar review.