Musannaf Ibn Abi Shayba 3:4650

Abu Bakr narrated to us, he said: Hushaym narrated to us, he said: Ibn Abi Layla informed us, from ‘Ata’, from ‘Ubayd ibn ‘Umayr, who said: I prayed the morning prayer behind ‘Umar ibn al-Khattab. He said in his Qunut: "O Allah, we seek Your help and we seek Your forgiveness, and we praise You with goodness, and we do not disbelieve in You, and we cast off and abandon whoever acts wickedly against You. O Allah, You alone we worship, and to You we pray and prostrate, and to You we strive and hasten. We hope for Your mercy and we fear Your punishment; indeed, Your punishment will overtake the disbelievers."