Matsyapurana 16.32

16.32

agnau kuryādanujñāto viprair vipro yathāvidhi
svagṛhyoktavidhānena kāṃsye kṛtvā caruṃ tataḥ //

By the permission of the Brâhmaṇas, the worshipper, according to the rules of his Gṛihya Sûtras, should take the boiled rice (Charu), in a vessel of bell-metal and offer it to fire, the Moon, and Yama, in the Dakṣinâgni, or Ekâgni if he does not keep all the fires. He should perform Paryukṣaṇa with the sacred thread on the left shoulder, and one who knows all the rites should perform it with the sacred thread thrown on the right shoulder.—32--34.