 गतेषु वानरेन्द्रेषु रामस्सुग्रीवमब्रवीत्।कथं भवान्विजानीते सर्वं वै मण्डलं भुवः।। 
 When the chieftains of the monkeys left, Rama enquired Sugriva, how he had come to know  the regions of the entire earth which is a mandala. a circular form. 