Ramayana
त्रिविक्रमे मया तात सशैलवनकानना । त्रिस्सप्तकृत्वः पृथिवी परिक्रान्ता प्रदक्षिणम् ॥ ४-६६-३२
'O dear when Visnu (Vamana incarnate) took three strides I circumambulated the whole earth including its mountains and trees twenty one times. [4-66-32]
english translation
trivikrame mayA tAta sazailavanakAnanA । trissaptakRtvaH pRthivI parikrAntA pradakSiNam ॥ 4-66-32
hk transliteration by Sanscript