Musnad Ahmad 25:1507

'Abd al-Rahman narrated to us, from Isra'il, from 'Abd al-Karim al-Jazari, from 'Ikrimah, from Ibn 'Abbas, who said: "The Messenger of Allah, peace and blessings of Allah be upon him, forbade blowing into food and drink." 'Abdullah said: My father said: And Abu Nu'aym narrated it to us from 'Ikrimah, as a mursal (report), and Muhammad ibn Sabiq narrated it to us, attributing it (as a musnad report) from Ibn 'Abbas.