Manava Dharmashastra 3.201

3.201

yadagnaukartavyaṃ taducyate | agneḥ caturthyarthe ṣaṣṭhī | agniraikā devatā | somayamābhyāmiti dvandvasya devatātvaṃ agnīṣomavat | anayordevatayorādita āpyāyanaṃ havirdānena kṛtvā paścātsantarpayetpitṝn | piṇḍanirvapaṇaṃ brāhmaṇabhojanaṃ ca kuryādityarthaḥ | gṛhye tvanyā devatāḥ samāmnātāḥ | yeṣāṃ gṛhyaṃ nāsti teṣāmidaṃ devatākavacanam | āpyāyanaṃ poṣaṇam | 'haviṣā devatāḥ puṣyantī'tyarthavādaḥ |

Having at fir st brought about the satisfaction of Agni and Soma-Yama by the offering of sacrificial food, he should afterwards satisfy, according to rule, the Pitṛs.—(211).

Medhātithi’s commentary (manubhāṣya):
It is now described what is to be done in the Fire.

The Genitive in ‘agneḥ’ has the sense of the Dative;

Agni is one deity, and Soma-Yama conjointly form one conjunct deity; just like Agni-Soma.

Of these two deities, ‘having brought about at first, the satisfaction, by the offering of sacrificial food, he should afterwards satisfy the Pitṛs.’ That is, he should offer balls of food and feed the Brāhmaṇas.

In the Gṛhyasūtra, other deities have been prescribed; so that the deities mentioned in the present text are for those who have no Gṛhyasūtra of their own.

‘Satisfaction’ stands for sustenance. That gods are sustained by sacrificial food, is a laudatory exaggertion.—(211).