Musnad Ahmad 987:3

Abu Abd al-Rahman narrated to us, Haywah narrated to us, Ayyash ibn Abbas informed us, that Kulayb ibn Subh narrated to him, that al-Zibriqan narrated to him, from his paternal uncle, Amr ibn Umayyah al-Damri, who said: We were with the Messenger of Allah, may Allah bless him and grant him peace, on one of his journeys, and they slept through the morning prayer until the sun had risen; they did not wake up. The Messenger of Allah, may Allah bless him and grant him peace, began with the two rak'ahs and performed them, then he called for the iqamah for the prayer and prayed.