Do Muslims believe in the 5 pillars?

Understanding the Five Pillars of Islam

Muslims are required to observe five fundamental practices throughout their lives. These essential rituals are known as the pillars of Islam because they serve as the essential support of a Muslim's faith and practices. The five pillars include: Shahada (the declaration of faith), Salah (prayer), Zakat (almsgiving), Sawm (fasting during Ramadan), and Hajj (the pilgrimage to Mecca).