The sawm is one of the Furu\’ al-Din (the duties to be performed according to Islamic Shari\’ah) of the holy religion of Islam. It is wajib upon every mukallaf to have sawm in the month of Ramadan. In order to obey the command of Allah, from the time of Salatal-Fajr to the time of Salat al-Maghrib one must refrain from muftirat (certain acts which break or invalidate the sawm) which make the sawm batil.
In Islam, much importance has been attached to sawm.