Pitṛgaṇa-Vibhāga (Classification of the Pitṛs) and the Śrāddha–Soma Nourishment Cycle
दौहित्रा यजमानाश्च प्रोक्ता ये भावयन्ति यान् / चत्वारो मूर्तिमन्तस्तु त्रयस्तेषाममूर्तयः
dauhitrā yajamānāśca proktā ye bhāvayanti yān / catvāro mūrtimantastu trayasteṣāmamūrtayaḥ
The dauhitras (daughter’s sons) and the yajamānas are spoken of as those who sustain and strengthen. Of them, four are embodied, while three are without form.