Musnad Ahmad 1310:1

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah narrated to us, from Khubayb ibn ‘Abd al-Rahman, from ‘Abd Allah ibn Muhammad ibn Ma‘n, from the daughter of Harithah ibn al-Nu‘man, she said: "I did not memorize {Qaf} except from the mouth of the Messenger of Allah, peace and blessings of Allah be upon him, while he was delivering the sermon with it on Friday." She said: "And our oven and the oven of the Messenger of Allah, peace and blessings of Allah be upon him, were one." Al-Hakam ibn Musa narrated to us—‘Abd Allah said: And I heard it from Al-Hakam—he said: ‘Abd al-Rahman ibn Abi al-Rijal narrated to us, he said: Yahya ibn Sa‘id mentioned it, from ‘Amrah, from Umm Hisham bint Harithah ibn al-Nu‘man, she said: "I did not take {Qaf, by the Glorious Qur’an} except from behind the Messenger of Allah, peace and blessings of Allah be upon him; he used to pray with it in the morning [prayer]."