Apastambagrihyasutra 2.7

2.7

aupāsanahomo, vaiśvadevaṃ, pārvaṇa, maṣṭakā, māsiśrāddhaṃ, sarpabaliṃ, rīśānabaliriti /
sapta ca haviryajñasaṃsthāḥ-agnihotraṃ, darśapūrṇamāsā, vāgrayaṇaṃ, cāturmāsyāni, nirūḍhapaśubandhas, sautrāmaṇiḥ, piṇḍapitṛyajñādayo darvīhomā iti /
(5)saptaiva ca somasaṃsthāḥ-agniṣṭomo,'tyāgniṣṭoma, ukthya, ṣyoḍaśī, vājapeyo, 'tirātro 'ptoryāma iti /
ete ca nityāḥ niyatapradikālīnajīvananimittakā ityarthaḥ /
kuta ete ca nityāḥ?'jāyamāno vai brāhmaṇastribhiṛṇavā jāyate brahmacaryeṇarṣibhyo yajñena'devebhyaḥ prajayā pitṛbhyaḥ,(tai.saṃ.6-3-10) ityatra 'yajñena'ityakavacanaṃ 'yajñaṃ vyākhyāsyāmaḥ'(āpa.pari.1-1) itivat jātyabhiprāyaṃ manyamānasya bhagavato vasiṣṭhasya 'naiyamikaṃhyetadṛṇatrayaṃ saṃstutam'(va.saṃ.11-47) iti