SB 12.3.5
samudravaranam jitva
mam visanty abdhim ojasa
kiyad atma-jayasyaitan
muktir atma-jaye phalam
Translation:
“After conquering all the land on my surface, these proud kings forcibly enter the ocean to conquer the sea itself. What is the use of their self-control, which is aimed at political exploitation? The actual goal of self-control is spiritual liberation.”