I can not give you the reference of Ram Chandar or Krishna, because they were not historical figures. I can not help it but to present to you the names of (Hazrat) Abu Bakar (RA) and (Hazrat) Umar Farooq (RA). They were leaders of a vast Empire, yet they lived a life of austerity.
The man who eats to live, who is friends with the five powers - earth, water, ether, sun and air - who is a servant of God, the Creator of all these, ought not to fall ill.