Musnad Abu Ya'la al-Mawsili 42:365

On the authority of Abu Sa’id, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "It shall be said to the companion of the Qur’an when he enters Paradise: 'Recite and ascend.' So he will recite and ascend for every verse a degree, until he recites the last thing that is with him."