Musannaf Ibn Abi Shayba 36:261

Abu Usama narrated to us, he said: Hammad bin Zayd narrated to us, from Ayyub, he said: Abd al-Rahman bin Abi Bakr said to Abu Bakr: "I saw you on the day of Uhud, and I turned away from you." He said: So Abu Bakr said: "But had I seen you, I would not have turned away from you."