Tahajjud, (Arabic: تَهَجُّد) also known as the "night prayer" or "Qiyam-u-lail", as well as "Namaaz-e-Shab" (نماز شب) in Persian (later borrowed into Urdu and Hindi) is a voluntary prayer performed by followers of Islam. It is not one of the five obligatory prayers required of all Muslims, although the Islamic prophet Muhammad was recorded as performing the tahajjud prayer regularly himself and encouraging his companions. The [prayer] is usually performed in the last third of the night.