योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-18, verse-54

एकरूपस्थिरं चक्रं स्वच्छं संतापवर्जितम् ।
नेह संप्राप्यते किंचिदग्नौ हिमकणो यथा ॥ ५४ ॥

ekarūpasthiraṃ cakraṃ svacchaṃ saṃtāpavarjitam ,
neha saṃprāpyate kiṃcidagnau himakaṇo yathā 54

54. Who has seen the wheel of fortune, to move on slowly in one straight forward course for ever, and not tumbling in its ups and downs, nor turning to this side and that in its winding and uneven route. Fixedness of fortune is a fiction, as that of finding the frost in fire.