The salah is a special form of worship that is the second most important pillar of Islam after the shahada (testimony of faith). It is an obligatory form of prayer performed five times a day as commanded by the Prophet Muhammad (peace be upon him). The salah involves a number of physical movements—standing, bowing, prostrating, and sitting. It also involves the recitation of verses from the Holy Quran in Arabic along with a number of dua. The salah is performed by Muslims five times a day. Each of the five prayers has names—Fajr, Asr, Maghrib, and Isha—and has a prescribed number of units to be performed during that prayer. The required physical movements within salah—standing, bowing, prostrating, and sitting—are performed in a fixed order to complete rak’ahs (units) of prayer.