Vaishnava Dharmashastra 67.23

67.23

tato dakṣiṇāgreṣu darbheṣu pitre pitāmahāya prapitāmahāya mātre pitāmahyai prapitāmahyai nāmagotrābhyāṃ ca piṇḍanirvāpaṇaṃ kuryāt ||

Afterwards he must offer upon blades of Kusa grass, having the points turned towards the south, balls of rice to his father, to his grandfather, and to his great-grandfather, to his mother, to his grandmother, and to his great-grandmother, proclaiming at the same time their name and race (and adding the word Svadhâ, 'reverence').