Musannaf Ibn Abi Shayba 35:130

Waki’ narrated to us, from Sufyan, from Zayd ibn Aslam, from Yasar or Bishr ibn Mihjan al-Du’ali, from his father, from the Prophet (peace be upon him), the like of it. And he mentioned that Abu Hanifah said: "The Fajr [prayer] is not to be repeated."