Shiva Purana
माघं भाद्रं विशिष्टं तु सर्वकालोत्तमोत्तमम् । एकवारं मिताशीतु वाग्यतो नियतेंद्रि यः ३६ ।
The months of Māgha and Bhādrapada are the most auspicious of all occasions. During the days of Japa be shall take only a single meal during the day in limited quantities. He shall abstain from useless talk and curb all his sense organs.
english translation
mAghaM bhAdraM viziSTaM tu sarvakAlottamottamam । ekavAraM mitAzItu vAgyato niyateMdri yaH 36 ।
hk transliteration by Sanscript