The Law Code of Yājñavalkya 1.10.1

1.10.1

idānīṃ śrāddhaprakaraṇam ārabhyate | śrāddhaṃ nāmādanīyasya tatsthānīyasya vā dravyasya pretoddeśena śrāddhayā tyāgaḥ | tac ca dvividhaṃ pārvaṇam ekoddiṣṭam iti | tatra tripuruṣoddeśena yat kriyate tat pārvaṇam | ekapuruṣoddeśena kriyamāṇam ekoddiṣṭam | punaś ca trividhaṃ nityaṃ naimittikaṃ kāmyaṃ ceti | tatra nityaṃ niyatanimittopādhau coditam ahar ahar amāvasyāṣṭakādiṣu | aniyatanimittopādhau coditaṃ naimittikaṃ yathā putrajanmādiṣu | phalakāmanopādhau vihitaṃ kāmyaṃ yathā svargādikāmanāyāṃ kṛttikādinakṣatreṣu tithiṣu ca | punaś ca pañcavidhaṃ: ahar ahaḥ śrāddhaṃ pārvaṇaṃ vṛddhiśrāddham ekoddiṣṭaṃ sapiṇḍīkaraṇaṃ ca iti | tatrāhar ahaḥ śrāddhaṃ annaṃ pitṛmanuṣyebhyaḥ (YDh 1.104) ityādinoktam | tathā ca manuḥ |

Now begins the section on śrāddha. A śrāddha is the relinquishment, with faith, of edible matter or its equivalent, dedicated to deceased ancestors. And that is of two kinds: pārvaṇa and ekoddiṣṭa. Among them, that which is performed dedicated to three generations of ancestors is pārvaṇa. That which is performed dedicated to a single ancestor is ekoddiṣṭa. And it is further of three kinds: daily (nitya), occasional (naimittika), and optional (kāmya). There, the daily is enjoined upon fixed conditions, day after day, on new moons, the aṣṭakā days, and the like. The occasional is enjoined upon non-fixed conditions, such as the birth of a son and the like. The optional is prescribed upon the condition of desiring a specific result, as when desiring heaven and the like, on lunar mansions such as Kṛttikā and lunar days. And it is again of five kinds: the daily śrāddha, pārvaṇa, vṛddhiśrāddha, ekoddiṣṭa, and sapiṇḍīkaraṇa. Among them, the daily śrāddha was stated in "food to the ancestors and humans" (YDh 1.104), and so forth. And Manu says likewise: