Mahabharata 1.176.2

1.176.2

tataste taṃ mahātmānaṃ śuddhātmānamakalmaṣam |
dadṛśuḥ pāṇḍavā rājanpathi dvaipāyanaṃ tadā || 2 ||

"Vaisampayana said, 'Thus addressed by the Brahmanas, the Pandavas, O Janamejaya, proceeded towards the country of the southern Panchalas ruled over by the king Drupada. And on their way those heroes beheld the illustrious Dwaipayana--that Muni of pure soul, and perfectly sinless. And duly saluting the Rishi and saluted by him, after their conversation was over, commanded by him they proceeded to Drupada's abode. And those mighty chariot-fighters proceeded by slow stages staying for some time within those beautiful woods and by fine lakes that they beheld along their way. Devoted to study, pure in their practices, amiable, and sweet-speeched, the Pandavas at last entered the country of the Panchalas. And beholding the capital, as also the fort, they took up their quarters in the house of a potter, Adopting the Brahmanical profession, they began to lead an eleemosynary life. And no men recognised those heroes during their stay in Drupada's capital.