One of the doors of Paradise, named ar-Rayyan, is specified for those Muslims who used to fast in this world. On the Day of Judgment, it will be opened, and those who used to fast in obedience to Allah would be called to enter through that door. Then it would be closed and no others will enter through it.

The month of Ramadan is the ninth month of the lunar year. It is the best month of the year, as is the night of al-Qadr in Ramadan the best night of the year. Fasting became an obligation on the Muslims in the second year after the emigration. Prophet Muhammed fasted nine years of Ramadan after which he died.