Sujūd, or sajdah, is the act of low bowing or prostration to God towards the qiblah. It is usually done in standardized prayers. The position involves kneeling and bowing till one touches the ground with the forehead, nose, palms, knees and toes, and remaining in that position until one attains a relaxed state while glorifying God thrice or more in odd number of times.
Overview
Sujud is one of the main pillars of daily prayer in Islam. A single act of sujud is called a sajdah. Muslims do sujud several times in each prayer, depending on the number of raka'at of prayer: two sajadat are performed every raka'ah, and prayers vary in obligatory length between two and four raka'at. A raka'ah is a unit of set actions that have to be performed in a prayer. The shortest fardMuslim prayer is that of fajr, performed immediately before sunrise. It consists of two raka'ah. The raka'ah can be described as follows:
Rising for the second, third, or fourth raka'ah. In the last raka'ah, one remains sitting and recites the tashahhud, and then performs the taslim by turning the head to the right and saying, as-salamu alaikum wa rahmatu Allah wa barakatuh, and then turning the head to the left and repeating the blessing to conclude the prayer.
Points 1-7 define one raka'ah. Thus, the shortest prayer, that of fajr, contains four sajadat. For Hanafis, witr prayer is three raka'ahs, which is for them considered wajib, a level of necessity below that of fard but above all else: in practice, this makes witr obligatory. While in sujud, the use of a turbah, on which a person places their forehead, is compulsory in most Shi'a schools of Islam.
Other types of sujud
Sajdah of thankfulness
This is from the sunnah of the Islamic prophetMuhammad that whenever he used to hear news which would make him happy, he would make sujud to thank Allah.
Sajdah of recitation / Tilawah
During the recitation of the Qur'an, including prayers in congregation, there are fifteen places where, when Muhammad recited a certain ayah, he prostrated to God. The verses are: In most copies of the Qur'an these are indicated by the symbol ۩, with an over-line on the word/s that invoked the prostration. Muslims must prostrate once in order to follow the Sunnah of Muhammad and recite any one or more of the following along with Takbeer before and after the sujud,
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Sajdah of forgetfulness
Sujud Sahwi or Sajdah of forgetfulness occurs during the ritual salat prayer. Out of forgetfulness a person can either omit obligatory parts of salat or add to the salat. In either cases the person corrects his/her salat by doing the Sujud Sahwi.
Rule of direction of the sujud
Sujud is made only to God. In prayer, Muslims face the Kaaba in Mecca, Saudi Arabia, but make their sujud to God, not the Kaaba. The Kaaba is only a united direction that Muslims face as it is the order of God in the Qur'an. If any person claiming to be Muslim makes a sujud to any thing/deity/person other than God, he is considered a disbeliever, unless it is forced upon them.
There are numerous things that a Muslim can say during sujud as is evident from the example of Muhammad. Among them are duas, hamd, tasbih and statements of Muhammad which make a person humble. Muslims are not allowed to recite the Qur'an during sujud. During the obligatory sujud during prayer one recites "سُبْحَانَ رَبِّيَ الْأَعْلَى".