These are the ordinances of God that have been set down in
the Books and Tablets by His Most Exalted Pen. Hold ye fast unto His statutes
and commandments, and be not of those who, following their idle fancies and
vain imaginings, have clung to the standards fixed by their own selves, and
cast behind their backs the standards laid down by God. Abstain from food and
drink from sunrise to sundown, and beware lest desire deprive you of this grace
that is appointed in the Book.
- Baha'u'llah ('The Kitab-i-Aqdas)