Garudapurana 1.227.10

1.227.10

tasmai deyaṃ tato grāhyaṃ sa ca pūjyo yathā hariḥ /
smṛtaḥ saṃbhāṣito vāpi pūjito vā dvijottamaḥ /
punāti bhagavadbhaktaścaṇḍālo 'pi yadṛcchayā //

To him gifts should be given, from him things should be received, and he should be worshipped like Hari. / Remembered, spoken to, or worshipped, O best of the twice-born, / a devotee of the Blessed Lord purifies even if he is a caṇḍāla, even by chance.