Aṣṭakā-Śrāddha Vidhi and Dāna-Praśaṃsā
Observances in the Dark Fortnight and Praise of Giving
पुत्रदारनिमित्ताः स्युरष्टकास्तिस्न एव तु / कृष्णपक्षे वरिष्ठा हि पूर्वाखण्डलदेवता
putradāranimittāḥ syuraṣṭakāstisna eva tu / kṛṣṇapakṣe variṣṭhā hi pūrvākhaṇḍaladevatā
These are indeed the three Aṣṭakā rites, ordained on account of son and wife; in the dark fortnight (Kṛṣṇa-pakṣa) they are held the most excellent, and their presiding deity is Pūrvākhaṇḍala.