योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-60, verse-57

भूमयान्येकनिष्ठानि निष्पिण्डान्येव कानिचित् ।
कानिचिद्वारिपूर्णानि वह्निपूर्णानि कानिचित् ॥ ५७ ॥

bhūmayānyekaniṣṭhāni niṣpiṇḍānyeva kānicit ,
kānicidvāripūrṇāni vahnipūrṇāni kānicit 57

57. There are some made of one material only (as solid earth), and others have no solidity in them (as air &c.); some are composed of the watery substance, and others are full of fiery matter in them.