Musannaf Ibn Abi Shayba 3:4656

Abu Bakr narrated to us, he said: Waki’ ibn al-Jarrah narrated to us, he said: Sufyan narrated to us, from Mukhariq, from Tariq ibn Shihab: That he prayed the Fajr prayer behind Umar ibn al-Khattab. When he finished the recitation, he said the takbir, then he performed the qunut, then he said the takbir, then he bowed.