Musnad Abu Ya'la al-Mawsili 113:31

Abu Khaythama and Ja'far ibn Muhammad narrated to us, they said: 'Affan narrated to us, Wahib narrated to us, from Ayyub, from Abu Qilabah, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) prayed Dhuhr in Medina as four [rak'ahs], and he prayed 'Asr at Dhu al-Hulayfah as two [rak'ahs]. He spent the night there until morning came. When he prayed Subh, he mounted his riding beast. When his riding beast rose with him, he glorified Allah (said SubhanAllah) and magnified Him (said Allahu Akbar) until it stood level with him upon the desert (al-Bayda'). Then he combined them [the prayers]. When we arrived in Mecca, the Messenger of Allah (may Allah bless him and grant him peace) commanded them to exit [the state of Ihram]. When the Day of Tarwiyah arrived, they entered into the state of Ihram for Hajj. The Messenger of Allah (may Allah bless him and grant him peace) slaughtered seven camels by his own hand while they were standing. And the Messenger of Allah (may Allah bless him and grant him peace) sacrificed two horned, black-and-white rams.