Explanation

The pillars of Islam are Shahada (declaration of faith), Salat (Namaz/prayer), Zakat (charity), Sawm (fasting), and Hajj (pilgrimage). Therefore, Namaz is generally considered the second pillar after Shahada. Zakat is a pillar but not the third in the standard enumeration following the first two pillars. Touheed is the concept of oneness of God, which is part of the first pillar (Shahada) and not a distinct pillar itself. Fasting (Sawm) is the fourth pillar.