The Friday prayer (Arabic: صَلاة الجُمُعَة) is a congregational prayer with two rak'as, prayed in the Friday noon instead of the noon prayer, there are two sermons said by Imam of Friday prayer who also leads the prayer. Most of the Shi'a jurists consider praying the Friday prayer, in the time of the occultation of Imam al-Mahdi (a), as an disjunctive obligation. In Qur'an 62, the importance of the Friday prayer is stated; also in hadith the Friday prayer is referred to as the "hajj of the poor" and leaving it causes the hypocrisy and difficulties in the one's life. Holding the Friday prayer is one of the signs of the unity of the Islamic society and it is necessary to be held congregational. Considering the political and social content of the sermons, the Friday prayer is a worship which has also a political and social importance.