CC 1.3.22

yadā yadā hi dharmasya
glānir bhavati bhārata
abhyutthānam adharmasya
tadātmānaṁ sṛjāmy aham

yadā yadā - whenever; hi - certainly; dharmasya - of religious principles; glāniḥ - decrease; bhavati - there is; bhārata - O descendant of Bharata; abhyutthānam - increase; adharmasya - of irreligion; tadā - then; ātmānam - Myself; sṛjāmi - manifest; aham - I.

Text

“ ‘Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion — at that time I descend Myself.

Purport

Sri Caitanya Caritamrita. Adi-lila

Chapter 3: The External Reasons for the Appearance of Sri Caitanya Mahaprabhu. Text 22

“ ‘Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion — at that time I descend Myself.