Tarawih (Arabic: تراويح) prayers are extra prayers given at night in the Islamic month of Ramadan. Tarawih prayers consist of either 8 or 20 raka'ahs, depending one which madhhab one follows. It is normal to attempt to recite the whole of the Qur'an during Ramadan. This is done by reciting one juz each night or in each tarawih by dividing the juz into several verses recited in one raka'ah.
Tarawih was originally invented by Umar ibn al-Khattab.
