Fasting throughout Ramadan is the fourth of the five pillars of Islam. Therefore, it is obligatory for each adult, sane, responsible Muslim to observe fasting throughout Ramadan.
Related books
Fasting
Fast of Ramadan: Once each year, Muslims are commanded to fast for an entire month from dawn to sunset.
Osoul Global Center
Fasting in Islam
Fasting includes self-refinement and discipline. It pleases the Lord, provides nourishment for the soul and teaches patience, self-control and appreciation of provisions often taken for granted. But a believer’s objective must be to fulfill his obligation to his Lord, to show servitude to Him, and to obey His command. He fasts only for the acceptance of Allah and His promised reward. This booklet discusses the fast of Ramadhan, other obligatory fasts and the voluntary fasting prescribed in the Sunnah..
Saheeh International
