Yahya related to me from Malik from Hisham ibn Urwa from his father that Dhakwan Abu Amr (a slave belonging to A’isha, the wife of the Prophet, may Allah bless him and grant him peace, who was freed by her after her death) used to stand in prayer and recite for her in Ramadan.
شعيب الأرنؤوط (١٤٣٨ هـ)، تخريج شرح السنة ٣/٤٠١ • إسناده صحيح
(i.e. The slave used to lead the Salah by reciting from the Mushaf.)
From Islamqa.info|69670
Ibn Wahb said: Ibn Shihaab said: The best of us used to read from the Mus-haf during Ramadaan. Al-Mudawwanah, 1/224.
Al-Nawawi said: If he reads from the Mus-haf that does not invalidate his prayer, whether he had memorized it or not. Rather he should do that if he has not memorized al-Faatihah, and if he turns the pages sometimes whilst praying that does not invalidate his prayer. … This is our view and the view of Maalik, Abu Yoosuf, Muhammad and Ahmad. End quote from al-Majmoo’, 4/27.
Sahnoon said: Maalik said: There is nothing wrong with the imam leading the people (in prayer) whilst reading from the Mus-haf in Ramadaan and in naafil prayers. Ibn al-Qaasim said: That is makrooh in the case of obligatory prayers. Al-Mudawwanah, 1/224.
Saheehus-Seerah 