Ramayana
उपोपविष्टैः सचिवैः सार्धं राक्षसपुङ्गवः । प्रख्याय नर्मदां सो ऽथ गङ्गेयमिति रावणः ॥ 7-31-25 ॥
that bull among rakshasas, Ravana, sat down together with his ministers who had seated themselves nearby, and proclaiming, "This Narmada is like the Ganga,"
english translation