Charak Samhita
संवत्सरं पयोवृत्तिर्गवां मध्ये वसेत् सदा। सावित्रीं मनसा ध्यायन् ब्रह्मचारी यतेन्द्रियः ॥९॥
[Kevala Amalaka Rasayanam] One should live in amidst cows, remain on milk diet mediate on Savitri mantra(Gayatri mantra), observing celibacy and controlling his sense organs for a year.
english translation
saMvatsaraM payovRttirgavAM madhye vaset sadA। sAvitrIM manasA dhyAyan brahmacArI yatendriyaH ॥9॥
hk transliteration by Sanscript