The best and most equitable fast is to fast a day for your rights and to fast a day for the rights of your Lord, and between them is a day to break the fast, for it is the greatest struggle against the soul and the most just in judgment. And in such a fast, the state of prayer is like the state of light from the light of the sun, for prayer is light and patience is light, and fasting and prayer are acts of worship divided between Lord and servant, and likewise the fast of David, peace be upon him: fast one day and break the fast one day, so you combine what is yours and what is your Lord’s .