Yada Yada Hi Dharmasya
यदा यदा हि धर्मस्य
ग्लानिर्भवति भारत ।
तदात्मानं सृजाम्यहम् ॥
yadā yadā hi dharmasya
glānirbhavati bhārata ।
tadātmānaṁ sr̥jāmyaham ॥
This shloka is from Bhagavad Gita, Chapter 4, Verse 7.
This was said by Bhagwan Sri Krishna to Arjuna.
Whenever there is decay of righteousness, O Bharata,
And there is exaltation of unrighteousness, then I Myself come forth.