Theodore Roosevelt actually said...

I appreciate in the full the solemn responsibility this confidence imposes upon me, and I shall do all that in my power lies not to forfeit ...

The wise custom which limits the President to two terms regards the substance and not the form.

Under no circumstances will I be a candidate for or accept another nomination.

On the Fourth of March next I shall have served three and one-half years, and this three and one-half years constitutes my first term.