Zakat, Sawm, and Hajj are essential pillars of Islam that involve charity, fasting during Ramadan, and pilgrimage to Mecca, respectively.
Zakat is one of the pillars of Islam that involves giving a portion of one's wealth to the poor, usually one fortieth (2.5%).
Sawm, the fourth pillar, requires Muslims to fast during Ramadan, abstaining from food, drink, and other physical needs from dawn to dusk.
Hajj is the fifth pillar, where Muslims are expected to undertake a pilgrimage to Mecca at least once in their lifetime if they are able and can afford it.
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