Vishnupurana 2.15.6

2.15.6

devikāyāstaṭe vīranagaraṃ nāma vai puram /
samṛddamatiramyaṃ ca pulastyena viveśitma //

"The residence of Pulastya was at Víranagara, a large handsome city on the banks of the Devíká river. In a beautiful grove adjoining to the stream the pupil of Ribhu, Nidágha, conversant with devotional practices, abode. When a thousand divine years had elapsed, Ribhu went to the city of Pulastya, to visit his disciple. Standing at the doorway, at the end of a sacrifice to the Viśwadevas, he was seen by his scholar, who hastened to present him the usual offering, or Arghya, and conducted him into the house; and when his hands and feet were washed, and he was seated, Nidágha invited him respectfully to eat (when the following dialogue ensued):--