Abu Dawud Book 2, Hadith Number 1386.

Chapter : In how many days should one complete the recitation of the quran.

Narated By Khaithamah : ‘Abd Allah b. ‘Amr said: The Apostle of Allah (PBUH) said to me: Recite the Qur’an in one month. I said: I have (more) energy. He said: Recite it in three days.

Abu ‘Ali said: I heard Abu Dawud say: I heard Ahmad b. Hanbal say: The narrator ‘Isa b. Shadhan is a sane person.