juz'

A juzʼ (Arabic: ; : , ajzāʼ; ) is one of thirty parts of varying lengths into which the Quran is divided. It is also known as parah (Persian: ) in Iran and subsequently the Indian subcontinent. There are 30 ajzāʼ in the Quran, also known as – sipārah ("thirty parts"; in Persian si means 30).

During medieval times, when it was too costly for most Muslims to purchase a manuscript, copies of the Qurʼān were kept in mosques and made accessible to people; these copies frequently took the form of a series of thirty parts (juzʼ). Some use these divisions to facilitate recitation of the Qurʼān in a month—such as during the Islamic month of Ramadan, when the entire Qurʼān is recited in the Tarawih prayers, typically at the rate of one juzʼ a night.