Musannaf Ibn Abi Shayba 3:4605

Hushaym narrated to us, he said: 'Urwah al-Hamdani informed us, he said: Al-Sha'bi narrated to us, he said: When 'Ali performed the Qunut in the morning prayer, the people disapproved of that. He said: So he said: "We only sought victory against our enemy."