Amāvasyā-Pitṛtarpaṇa: Purūravas and the Soma-Based Ancestral Offering (अमावस्या-पितृतर्पण / सोमतर्पण-विधि)
सौम्यान्बर्हिषदः काव्यानग्निष्वात्तांस्तथैव च / ऋतमग्निस्तु यः प्रोक्तः स तु संवत्सरो मतः
saumyānbarhiṣadaḥ kāvyānagniṣvāttāṃstathaiva ca / ṛtamagnistu yaḥ proktaḥ sa tu saṃvatsaro mataḥ
Saumyas, Barhiṣads, Kavyas, and Agniṣvāttas—these are the orders of the Pitṛs; and he who is called Ṛtam-agni is regarded as Saṃvatsara, the Year.