Skandapurana 1.4.37.41

1.4.37.41

daśottareṇa payasā vṛtaṃ taccāpi tejasā..
tejaśca vāyunā vāyurnabha sāhaṃtayā ca tat.. 39.41 ..

It is surrounded by water ten times [its size], and that by fire; / fire by air, air by space, and that by egoity;