This pillar encompasses the requirement for every able adult Muslim to fast the days of Ramadan. This includes abstaining from foods, drinks, and anything that invalidates/breaks the fast from dawn to sunset. Fasting has been obligated on us just like the nations before us so we can become mindful of Allah, as mentioned in Surah al Baqarah:
O believers! Fasting is prescribed for you—as it was for those before you1—so perhaps you will become mindful ˹of Allah˺.
Ramadan is not made to be a burden on the Muslims, but a ease for those capable, as mentioned in Surah al Baqarah:
Ramaḍân is the month in which the Quran was revealed as a guide for humanity with clear proofs of guidance and the decisive authority. So whoever is present this month, let them fast. But whoever is ill or on a journey, then ˹let them fast˺ an equal number of days ˹after Ramaḍân˺. Allah intends ease for you, not hardship, so that you may complete the prescribed period and proclaim the greatness of Allah for guiding you, and perhaps you will be grateful.