Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1892
'Amra daughter of Abd al-Rahman reported on the authority of the sister of Amra, I memorised (surah) Qaf=surah l.):" By the glorious Qur'an" from the mouth of the Messenger of Allah (may peace be upon him) on Friday for he recited it on the pulpit on-every Friday.