Manusmriti

siva.sh/manusmriti/3/187

पूर्वेद्युरपरेद्युर्वा श्राद्धकर्मण्युपस्थिते । निमन्त्रयेत त्र्य्ऽवरान् सम्यग् विप्रान् यथौदितान् ॥ १८७ ॥

sanskrit

On the day before the Sraddha-rite is performed, or on the day when it takes place, let him invite with due respect at least three Brahmanas, such as have been mentioned above.

english translation

pUrvedyuraparedyurvA zrAddhakarmaNyupasthite | nimantrayeta try'varAn samyag viprAn yathauditAn || 187 ||

hk transliteration by Sanscript