All material entities undergo transformation and are constantly and swiftly eroded by the mighty currents of time. The various stages of existence that material things exhibit are the perpetual causes of their generation and annihilation.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कालस्रोतो जवेनाशु ह्रियमाणस्य नित्यदा । परिणामिनामवस्थास्ता जन्मप्रलयहेतवः
kālasroto javenāśu hriyamāṇasya nityadā | pariṇāmināmavasthāstā janmapralayahetavaḥ
SB 12.4.36