Bible Verses About Warfare of Saints: With self-denial

And every man that striveth in the games exerciseth self-control in all things. Now they do it to receive a corruptible crown; but we an incorruptible.

I therefore so run, as not uncertainly; so fight I, as not beating the air:

but I buffet my body, and bring it into bondage: lest by any means, after that I have preached to others, I myself should be rejected.