Tarawih runs every night of Ramadan after the obligatory night prayer, and the number of units is one of the oldest routine disagreements in Sunni practice: eight in some traditions, twenty in most, with the argument tracing back to the second caliph's reorganisation. What makes it distinctive is the recitation — a hafiz reads roughly one-thirtieth of the Quran each night so the entire book is completed publicly across the month. A gifted reciter draws crowds across a city; people will travel past three mosques to reach one. In Indonesia, Egypt and Turkey the leading reciters are recognised figures with recordings and followings. It is physically demanding: an hour or more standing, every night for twenty-nine or thirty nights, on a stomach that ate at sunset.