Fasting Three Days Every Month

The Prophet advised us to fast the 13th, 14th and 15th days of the Islamic lunar month (calendar based on the movements of the moon). Because of the brightness caused by the full moon during the night, these days are called "ayyam al-bid" (the white days). Abu Hurayrah said about the topic “My friend (i.e. the Prophet) (saw) advised me with three things: To fast three days every month, to pray two rak'ahs of Duha Prayer, and to pray the Witr before going to bed." (Bukhari, Sawm, 60)