Types of Fasting

There are three types of fasting:

1. The fasting of commons, which is the renunciation of eating and drinking, and observance of other fasting requirements as described in the Books of Jurisprudence.
   
2. The fasting of nobles, which in addition to the above also includes renunciation of sins i.e. controlling eyes, ears, tongue, and other bodily parts from sinning and transgression.
   
3. The fasting of most distinguished nobles which in addition to the renunciation of the above also includes relinquishment of everything, be it permissible or forbidden, which makes mind and conscience negligent from Allah's remembrance.

Reference:- Spritual Journey of the Mystics(Suluk e Irfaan) - By Late Haj Mirza Javad Agha Malaki Tabrizi(R.A.)