Two men from the tribe of Banu Bakr reported, "We saw the Messenger of Allah ﷺ delivering a sermon on the middle day of the days of Tashriq while we stood beside his mount. This was the sermon of the Messenger of Allah ﷺ which he delivered at Mina."
حدثنا محمد بن العلاء حدثنا ابن المبارك عن إبراهيم بن نافع
عن رجلين من بني بكر قالا رأينا رسول الله ﷺ يخطب بين أوسط أيام التشريق ونحن عند راحلته وهي خطبة رسول الله ﷺ التي خطب بمنى
[Its isnad is daif] Bayhaqi transmitted it, 5/151, from the hadith of Abu Dawud with this chain, and Ahmad, 5/370, from the hadith of Ibrahim bin Nafi with this chain. Ibn Abu Najeeh is a mudallis narrator and he used the ambiguous form "an" in transmitting it.