SB 10.87.6
yo vai bharata-varse ’smin
ksemaya svastaye nrnam
dharma-jñana-samopetam
a-kalpad asthitas tapah
Translation:
From the very beginning of Brahma’s day Lord Narayana Rsi has been undergoing austere penances in this land of Bharata while perfectly performing religious duties and exemplifying spiritual knowledge and self-control — all for the benefit of human beings in both this world and the next.