Aśauca-vidhi (Rules of Impurity) within Śrāddha-kalpa — Chapter on Testing/Selecting Brahmanas and Honoring the Atithi
अक्लिष्ट मव्रणं युक्तं कृशवृत्तिमयाचकम् / एकान्तशीलं धीमन्तं सदा श्राद्धेषु भोजयेत्
akliṣṭa mavraṇaṃ yuktaṃ kṛśavṛttimayācakam / ekāntaśīlaṃ dhīmantaṃ sadā śrāddheṣu bhojayet
应在施行施罗陀(śrāddha)时,常请那无苦恼、无创伤、持戒端正、清贫自守、不行乞求、性喜独处而有智慧者受食。