Abu Najih narrates from two men of Banu Bakr (may Allah be pleased with them both) that they said: We saw the Messenger of Allah (peace and blessings be upon him) delivering a sermon in the middle of the days of Tashriq while we were beside his mount, and this is the sermon that he (peace and blessings be upon him) delivered at Mina.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9680