Yada Yada hi Dharmasya Glanir Bhavati Bharata
Abhyuthanam Adharmasya Thadathmanam Srujaamyaham
Chapter 4 Verse 7 Bhagavad Gita
”Whenever whenever there is the decay of dharma, O Bharata, And there is the exaltation of unrighteousness, then I Myself come forth;”