Laylat al-Qadr
Shia Muslims similarly believe that Laylat al-Qadr is to be found in the last ten odd nights of Ramadan but mostly on the 19th, 21st or 23rd of Ramadan with 23rd being the most important night. The 19th, according to the Shia belief, coincides with the night Ali was attacked in the Mihrab while worshipping in the Great Mosque of Kufa. He died on 21 Ramadan.