There are 32 water sources inside Al-Aqsa Mosque: two pools, two cisterns, eight sabeels (a public water source that is meant to service people for free), and twenty wells, that were built and dug out by Muslims to provide running water sources for worshipers inside Al-Aqsa Mosque to perform ablution, drink and irrigate the plants and trees inside the compound.
Al-Ka’as is an ablution that was built by the Ayoubi Sultan Al-Adel Abu Bakr bin Ayoub in 589 AH/1193 AC. It is a circular basin with a fountain in the middle which is surrounded by an ornamented iron fence encircled by stone stools. It has a number of side faucets pinned on it for wadu’ (ablution). Al Ka’as was last renovated by Sultan Qaitbay and Prince Tankz An-Nasiri in 728 AH/1327 AC.
2) Sabeel Qaitbay
Sultan Saif Ad-Din Ennal built this sabeel in 860 AH; however, only a well remained of its original structure. The Mamluk Sultan Qaitbay reconstructed the Sabeel and added the building made of colourful bricks and the marble ﬂoors. The building is also topped with an octagonal dome ornamented with Islamic motifs. The sabeel was renovated again by the Ottoman Sultan Abdul Majid Khan in 1300 AH/1882-1883 AC. Today, it is made of two ﬂoors; the first ﬂoor has a well on its grounds, while the second is a tank used for storing water.