Manusmriti

siva.sh/manusmriti/3/220

ध्रियमाणे तु पितरि पूर्वेषामेव निर्वपेत् । विप्रवद् वाऽपि तं श्राद्धे स्वकं पितरमाशयेत् ॥ २२० ॥

sanskrit

But if the (sacrificer’s) father is living, he must offer (the cakes) to three remoter (ancestors); or he may also feed his father at the funeral sacrifice as (one of the) Brahmana (guests).

english translation

dhriyamANe tu pitari pUrveSAmeva nirvapet | vipravad vA'pi taM zrAddhe svakaM pitaramAzayet || 220 ||

hk transliteration by Sanscript