Matsyapurana 68.16

68.16

gomayenānuliptāyāṃ bhūmāvekāgnivattadā
taṇḍulai raktaśālīyaiś caruṃ gokṣīrasaṃyutam
nirvapetsūryarudrābhyāṃ tanmantrābhyāṃ vidhānataḥ //

The worshipper should consult Brâhmaṇas about his lucky stars and then fix some auspicious day for the rituals, avoiding the birth asterism of the child. This ritual applies to old men and to others suffering from illness, etc.—15. According to the rites of the Ekâgni fire ceremony, the devotee should locate the Fire on an altar, plastered over with cowdung, and cook on that fire pudding (charu), with red rice and cow's milk, and offer it to Sûrya and Rudra by reciting the mantras of Rudra and the God Sun.—16.