Shiva Purana
लक्षयोजनविस्तारस्समस्तपरिमण्डलः ॥ जम्बूद्वीपो मया ख्यातः क्षारोदधिसुसंवृतः ॥ २२॥
This Jambūdvīpa extends to a hundred thousand Yojanas including all its internal zones. It is well surrounded by the salt ocean.
english translation
lakSayojanavistArassamastaparimaNDalaH ॥ jambUdvIpo mayA khyAtaH kSArodadhisusaMvRtaH ॥ 22॥
hk transliteration by Sanscript