Ramayana
सर्पराजो महाप्राज्ञो यस्यां वसति वासुकिः । निर्याय मार्गितव्या च सा च भोगवती पुरी ॥ ४-४१-३९
'The wise serpent king Vasuki resides there. (Bhogavati is the replica of the city of the same name in Patala, the sixth subterranean region). Emerging from this city of Bhogavati - ॥ 4-41-39॥
english translation
sarparAjo mahAprAjJo yasyAM vasati vAsukiH । niryAya mArgitavyA ca sA ca bhogavatI purI ॥ 4-41-39
hk transliteration by Sanscript