Sanskrit (Shloka):
“Yadā yadā hi dharmasya glānir bhavati bhārata,
abhyutthānam adharmasya tadātmānaṁ sṛjāmy aham.”
Yadā yadā hi dharmasya – Whenever and wherever dharma (righteousness, duty, moral order) declines...
glānir bhavati bhārata – ...there is decay, deterioration, or weakening...
Abhyutthānam adharmasya – ...and adharma (unrighteousness, injustice, chaos) rises...
Ttadātmānaṁ sṛjāmy aham.– ...then I (Krishna, representing God/Divine) incarnate myself.