Musannaf Ibn Abi Shayba 3:1231

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Mis’ar, from ‘Adi ibn Thabit, from al-Bara’ ibn ‘Azib, he said: I heard the Prophet, may Allah bless him and grant him peace, reciting in the ‘Isha’ prayer: "By the Fig and the Olive."