Sayyiduna Abu Sa'id (may Allah be pleased with him) said: We set out with the Messenger of Allah (peace and blessings be upon him) raising our voices with the talbiyah for Hajj. When we reached Makkah, he commanded us "to make it an Umrah," except those who had sacrificial animals with them. Then, when the Day of Tarwiyah came and we went towards Mina, we said the talbiyah for Hajj.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8937