Musannaf Ibn Abi Shayba 3:5230

'Affan narrated to us, Sa'id ibn Zayd narrated to us, he said: Al-Zubayr ibn al-Khirrit narrated to us, from 'Ikrimah, from Ibn 'Umar, he said: "It is not to be said: 'We have turned away from the prayer,' but rather: 'The prayer has been completed.'"