SB 12.4.36

kāla-sroto-javenāśu
 hriyamāṇasya nityadā
pariṇāminām avasthās tā
 janma-pralaya-hetavaḥ
Word for word: 
kāla — of time; srotaḥ — of the mighty current; javena — by the force; āśu — rapidly; hriyamāṇasya — of that which is being taken away; nityadā — constantly; pariṇāminām — of things subject to transformation; avasthāḥ — the various conditions; tāḥ — they; janma — of birth; pralaya — and annihilation; hetavaḥ — the causes.
Translation: 
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.