Musnad Ahmad 567:1

Ya'qub narrated to us, my father narrated to us, from Ibn Ishaq, who said: 'Imran ibn Abi Anas narrated to me, from Hanzalah ibn 'Ali al-Aslami, from a man from Banu al-Dil, who said: I prayed Dhuhr in my house, then I went out with camels of mine to take them to the shepherd. I passed by the Messenger of Allah, peace and blessings of Allah be upon him, while he was leading the people in the Dhuhr prayer, so I continued on and did not pray with him. When I had taken my camels to the shepherd and returned, that was mentioned to the Messenger of Allah, peace and blessings of Allah be upon him, and he said to me: "What prevented you, O so-and-so, from praying with us when you passed by us?" He said: I said, "O Messenger of Allah, I had already prayed in my house." He said: "Even so."