SB 11.23.29
so ’ham kalavasesena
sosayisye ’ngam atmanah
apramatto ’khila-svarthe
yadi syat siddha atmani
Translation:
If there is any time remaining in my life, I will perform austerities and force my body to subsist on the bare necessities. Without further confusion I shall pursue that which constitutes my entire self-interest in life, and I shall remain satisfied within the self.