Yahya bin Hakim bin Safwan narrates that Abdullah bin Amr bin As said: I memorized the entire Qur’an and then recited it in one night. So the Messenger of Allah, peace and blessings be upon him, said: I fear that time will become prolonged for you and you will become weary, so complete the Qur’an in one month. He says, I said: O Messenger of Allah! Grant me permission, let me benefit from my strength and youth. The Prophet, peace and blessings be upon him, said: Complete the Qur’an in twenty days. I said: O Messenger of Allah! Grant me permission, let me benefit from my strength and youth. The Prophet, peace and blessings be upon him, said: Complete it in ten days. I said: O Messenger of Allah! Grant me permission, let me benefit from my strength and youth. He said: Complete the Qur’an in seven days. I said: O Messenger of Allah! Grant me permission that I may benefit from my strength and youth, so the Prophet, peace and blessings be upon him, refused to grant permission to complete the Qur’an in less than that period.
Hadith Referenceالفتح الربانی / أبواب فى فضائل بعض الصحابة الكرام / 11814