Prayers are required to be performed five times in the course of every day; between daybreak and sunrise, between noon and the ´aṣr, (which latter period is about mid-time between noon and nightfall), between the ´aṣr and sunset, between sunset and the ´eshè (or the period when the darkness of night commences), and at, or after, the ´eshè. The commencement of each of these periods is announced by a chant (called adán), repeated by a crier (muëddin) from the mádineh, or minaret, of each mosque; and it is more meritorious to commence the prayer then than at a later time. On each of these occasions, the Muslim has to perform certain prayers held to be ordained by God, and others ordained by the Prophet; each kind consisting of two, three, or four "rek´ahs;" which term signifies the repetition of a set form of words, chiefly from the Ḳur-án, and ejaculations of "God is most Great!" etc., accompanied by particular postures; part of the words being repeated in an erect posture; part, sitting; and part, in other postures: an inclination of the head and body, followed by two prostrations, distinguishing each rek´ah.[11] These prayers may in some cases be abridged, and in others entirely omitted. Other prayers must be performed on particular occasions. On Friday, the Mohammadan Sabbath, there are congregational prayers, which are similar to those of others days, with additional prayers and exhortations by a minister, who is called Imám, or Khaṭeeb. The Selám (or Salutation) of Friday--a form of blessing on the Prophet and his family and companions,--is chanted by the muëddins from the mádinehs of the congregational mosques half-an-hour before noon. The worshippers begin to assemble in the mosque as soon as they hear it, and arranging themselves in rows parallel to, and facing, that side in which is the niche that marks the direction of Mekkeh, each performs by himself the prayers of two rek´ahs, which are supererogatory, and then sits in his place while a reader recites part or the whole of the 18th chapter of the Ḳur-án. At the call of noon, they all stand up, and each again performs separately the prayers of two rek´ahs ordained by the Prophet. A minister standing at the foot of the pulpit-stairs then proposes to bless the Prophet: and accordingly a second Selám is chanted by one or more other ministers stationed on an elevated platform. After this, the former minister, and the latter after him, repeat the call of noon (which the muëddins have before chanted from the mádinehs); and the former enjoins silence. The Khaṭeeb has already seated himself on the top step or platform of the pulpit. He now rises and recites a khuṭbeh of praise to God and exhortation to the congregation; and, if in a country or town acquired by arms from unbelievers, he holds a wooden sword, resting its point on the ground. Each of the congregation next offers up some private supplication; after which, the Khaṭeeb