Sahih Muslim Book 4, Hadith Number 1892.

Chapter : Warning on neglecting Jumu’a.

‘Amra daughter of Abd al-Rahman reported on the authority of the sister of Amra, I memorised (surah) Qaf – 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.