Laylat al-Qadr
Some commentators believe that the Quran was revealed to Muhammad twice. In addition to the gradual 23 year revelation until his death, there was an 'immediate revelation' that happened on the "Laylat al-Qadr". This is based on an understanding of sura Al-Qadr:1 as referring to descent of the Quran in its entirety. `Abd Allah ibn `Abbas reports that, "… descended in Ramadan, on the Laylat al-Qadr in one lay down (jumlah, Ar. جملة), …"