Musnad Ahmad 31:718

'Affan narrated to us, Wuhayb narrated to us, Dawud narrated to us, from Abu Nadra, from Abu Sa'id, or from Jabir ibn 'Abd Allah, who said: We arrived with the Messenger of Allah (may Allah bless him and grant him peace) shouting the Hajj [talbiyah] loudly. When we had performed Tawaf around the House, he said: "Make it an 'Umrah." Then, when it was the Day of Tarwiyah, we entered into Ihram for Hajj.