Musnad Ahmad 32:369

'Abd al-Samad narrated to us, Shu'bah narrated to us, Hamzah al-Dabbi narrated to us, he said: I met Anas ibn Malik at the mouth of the Nile, and Muhammad ibn 'Amr walked between me and him, and he mentioned the like of it. He said: So Muhammad ibn 'Amr said: "Even if it is at midday?"