Allah's Messenger (ﷺ) said to me, "Recite the whole Quran in one month's time." I said, "But I have power
(to do more than that)." Allah's Messenger (ﷺ) said, "Then finish the recitation of the Quran in seven days,
and do not finish it in less than this period."
Sahih al-Bukhari Book 66, Hadith 79