Matsya Purana 81.5

81.5

udaṅ‌mukhaḥ prāṅ‌mukho vā dantadhāvanapūrvakam.
ekādaśyāṃ nirāhāraḥ samabhyarcya tu pūrvakam
śriyaṃ vā'bhyarcya vidhivadbhokṣyāmi tvapare'hani.. 81.4..

The Viśokadvâdaśî ordinance falls in the month of Âśvina. On the tenth day of the fortnight, the devotee should take some light food and commence the ordinance by observing the prescribed rites.—3. On the Ekâdaśî day, he should brush his teeth by turning his face towards the north or the east. Then he should worship the Lord Keśava and the Goddess Lakṣmî, and fast the day. "I shall take my meal consisting of many dishes next day." With this thought, he should go to sleep, and, on getting up in the morning, he should bathe in Pañchagavya water, mixed with various medicines, and put on white clothes and garlands of white flowers. Afterwards, the worship of Lakṣmî and Nârâyaṇa should be commenced with white lotus flowers.—4-5.