Manusmriti

siva.sh/manusmriti/9/186

त्रयाणामुदकं कार्यं त्रिषु पिण्डः प्रवर्तते । चतुर्थः सम्प्रदातैषां पञ्चमो नोपपद्यते ॥ १८६ ॥

sanskrit

To three (ancestors) water must be offered, to three the funeral cake is given, the fourth (descendant is) the giver of these (oblations), the fifth has no connection (with them).

english translation

trayANAmudakaM kAryaM triSu piNDaH pravartate | caturthaH sampradAtaiSAM paJcamo nopapadyate || 186 ||

hk transliteration by Sanscript