If the venerable Shah Naqshband received a visitor when he himself was fasting (outside of the month of Ramadan), he would immediately provide a meal for the guest, breaking his fast in order to join him at the table. One day a dervish of his refused to eat with a guest, even when pressed to do so, on the grounds that he was keeping a supererogatory fast. Turning to his other pupils, the Khwaja said : “That man is far from Allah. Keep your distance from him”.

ref: Shushud, Hasan (1982). Masters of Wisdom of Central Asia. Coombe Springs Press. England