Shiva Purana
चक्षुरादीन्द्रियग्रामो भूतग्रामश्चतुर्विधः॥ । पितृश्राद्धे पिता तस्य पिता तस्य पिता त्रयः ॥ ४०॥
The group of sense-organs consists of the eye, etc; that of the Bhūtas is of four types. In the Pitṛ Śrāddha the father, grandfather and greatgrandfather are included.
english translation
cakSurAdIndriyagrAmo bhUtagrAmazcaturvidhaH॥ । pitRzrAddhe pitA tasya pitA tasya pitA trayaH ॥ 40॥
hk transliteration by Sanscript