Musnad Ahmad 27:515

Yahya ibn Yaman narrated to us, from Sufyan, from Ubayd Allah, from Nafi’, from Ibn Umar: "That the Prophet, peace and blessings of Allah be upon him, performed one tawaf for his qiran (combining Hajj and Umrah), he did not exit ihram between them, and he purchased his sacrificial animal from the road at Qudayd."