Musannaf Ibn Abi Shayba 3:5228

Abu al-Ahwas narrated to us, from Abu Ishaq, from Umayr ibn Yarim Abu Hilal, who said: I heard Ibn Abbas saying: "Do not say, 'We have turned away (insarafna) from the prayer,' for there is a people who turned away (insarafu), so Allah turned away (sarafa) their hearts. Rather, say, 'The prayer has been completed (qudiyat al-salah).'"