On the 9th Dhul Hijjah before noon the pilgrims come to Arafat which is a barren and plain land. Here they stand in contemplative vigil. They will offer supplications, will repent for sins they have committed, and seek the mercy of Allah. They will listen to the sermon carried out by Islamic scholars. Lasting from noon through sunset, or known as wuquf, it is said to be one of the most important rites of Hajj. The pilgrims will offer noon and also afternoon prayers at Masjid al-Namirah together at noontime. The pilgrim needs to spend the afternoon on Arafat or else the Hajj is regarded as being invalid.