The description of Pufkaradvipa Siita said : - Verse 16
Kurma Purana (GRETIL / Internet Archive OCR) · 50 · Verse 16
Sanskrit Original
आध्वर्यवं यजुर्भिः स्यादृग्भिर्हेत्रं द्विजोत्तमाः। औद्गात्रं सामभिश्चक्रे ब्रह्मत्वं चाप्यथर्वभिः।।
ādhvaryavaṃ yajurbhiḥ syādṛgbhirhetraṃ dvijottamāḥ| audgātraṃ sāmabhiścakre brahmatvaṃ cāpyatharvabhiḥ||
The extent of the great mountain Lokaloka is also that much. Enveloping that mountain beyond (on its other side) is eternal darkness which in its turn is encircled by the shell of the Cosmic Egg. Thus the seven great worlds and the Patalas have been recounted. 17-18a. The detailed description of the entire Cosmic Egg has been succinctly narrated by me. It should be known that there are thousands of crores of Cosmic Eggs like this. The PradharuP is present everywhere since it is the primary eause and is of unchanging nature.