Natyashastra
मुहूर्तेनानुकूलेन तिथ्या सुकरणेन च । ब्राह्मणांस्तर्पयित्वा तु पुण्याहं वाचयेत्ततः ॥ ३२॥
At an auspicious moment, on a favorable date, after performing rites to satisfy the Brahmins, the performer should then recite the sacred words (Punyaahāṃ) with devotion.
english translation
muhUrtenAnukUlena tithyA sukaraNena ca । brAhmaNAMstarpayitvA tu puNyAhaM vAcayettataH ॥ 32॥
hk transliteration by Sanscript