Aśauca-vidhi (Rules of Impurity) within Śrāddha-kalpa — Chapter on Testing/Selecting Brahmanas and Honoring the Atithi
मिथ्यासंकल्पिनः सर्वानुद्वृत्तांश्च विवर्जयेत् / मिथ्याप्रवादी निन्दाकृत्तथा सूचकदांभिकौ
mithyāsaṃkalpinaḥ sarvānudvṛttāṃśca vivarjayet / mithyāpravādī nindākṛttathā sūcakadāṃbhikau
One should shun all who harbor false intentions and those who are insolently wayward; likewise the liar, the slanderer, the informer, and the hypocritical pretender.