Shiva Purana
धेनुमुद्रां प्रदर्श्याथ सुजलैस्तर्पणं चरेत् ॥ पंचब्राह्मणभोजं च कल्पयेद्वै यथाबलम् ॥ ५८ ॥
The devotee shall exhibit the mystic gesture of cow and offer Tarpaṇa with pure water. He shall then feed five Brahmins or more in accordance with his capacity.
english translation
dhenumudrAM pradarzyAtha sujalaistarpaNaM caret ॥ paMcabrAhmaNabhojaM ca kalpayedvai yathAbalam ॥ 58 ॥
hk transliteration by Sanscript