Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 5
Sanskrit:
यो वायं द्वीप: कुवलयकमलकोशाभ्यन्तरकोशो नियुतयोजन विशाल: समवर्तुलो यथा पुष्करपत्रम् ॥ ५ ॥
ITRANS:
yo vāyaṁ dvīpaḥ kuvalaya-kamala-kośābhyantara-kośo niyuta-yojana-viśālaḥ samavartulo yathā puṣkara-patram.
Translation:
The planetary system known as Bhū-maṇḍala resembles a lotus flower, and its seven islands resemble the whorl of that flower. The length and breadth of the island known as Jambūdvīpa, which is situated in the middle of the whorl, are one million yojanas [eight million miles]. Jambūdvīpa is round like the leaf of a lotus flower.