Rozay ky Masil description

The Quran says:
Oh ye who believe! Fasting is prescribed to you as it was prescribed to those before you that ye may (learn) self-restraint. (II: 183).
Fasting is obligatory for Muslims in the month of Ramzan. Failure to observe the fast on any day, without a valid reason, during this month is a great sin. We have it on the authority of the Prophet that, “Anyone who does not, without illness or any other valid excuse, keep fast on a single day during Ramzan will not succeed in making amends for it even if he were to keep fast daily throughout his life in atonement”.