The Mahabharata/Book 1: Adi Parva…
“ And the god Vasava is worshipped in due form with such garlands and ornaments. And the god, for the gratification of the illustrious Vasu, assuming the form of a swan, came himself to accept the worship thus offered. And the god, beholding the auspicious worship thus made by Vasu, that first of monarchs, was delighted, and said unto him, 'Those men, and kings also, who will worship me and joyously observe this festival of mine like the king of Chedi, shall have glory and victory for their countries and kingdom. Their cities also shall expand and be ever in joy.'p. ”
