Musnad Abu Ya'la al-Mawsili 221:1

Zuhayr narrated to us, Jarir narrated to us, from Muhammad ibn Ishaq, from Abdullah ibn Abi Bakr, from Yahya ibn Abdullah, from Umm Hisham bint Harithah ibn al-Nu'man, who said: I recited "Qaf. By the Glorious Qur'an" from the mouth of the Messenger of Allah, may Allah bless him and grant him peace. He used to recite it every Friday when he addressed the people.