Question: Is it allowed to read from a Qur.aan during the late-night [Tahajjud] prayer since I have memorized very little and I desire to finish the Qur.aan during the late-night prayers?
Response: There is no harm in that. Dhakwan, the freed slave of �Aa.ishah, used to lead them in prayer during Ramadhaan reading from a copy of the Qur.aan. Al-Bukhaaree recorded that in his Saheeh with a definitively-stated discontinuous chain. This is the opinion of a large number of scholars. Those who don't allow it have no evidence to support them. Not everyone has the Qur.aan memorised and, therefore, there is a need to read it from a copy of the Qur.aan in the prayer and otherwise. This is especially true for the late night prayers and during the night prayers of Ramadhaan for those who have not memorized the Qur.aan in their hearts.
Shaykh Ibn Baaz
Fataawa al-Mar.ah