Arthashastra
सुरुङ्गा युक्ते वा कूपे नागम् अनियत शिरस्कं हिरण्य उपहारेण दर्शयेत् ॥
Or spies may call upon spectators to see a serpent with numberless heads in a well connected with a subterranean passage and collect fees from them for the sight.
english translation
suruGgA yukte vA kUpe nAgam aniyata ziraskaM hiraNya upahAreNa darzayet ॥
hk transliteration by Sanscript