When the cause of Virtue suffers, this Krishna takes birth in the family of either the gods or among men. Staying on Virtuc, this Krishna of purified soul (on such occasions) protects both the higher and the lower worlds.
यदा धर्मो ग्लाति वंशे सुराणां तदा कृष्णो जायते मानुषेषु। धर्मे स्थित्वा स तु वै भावितात्मा परांश्च लोकानपरांश्च पाति॥