Ibn Murba al-Ansari came to us while we were at Arafah, in a spot which Amr describes as far from the imam, and said, "I am the messenger of the Messenger of Allah ﷺ to you. He tells you, 'Remain at your ritual stations, for you are upon a heritage from the heritage of your father Ibrahim.'"
حدثنا ابن نفيل حدثنا سفيان عن عمرو يعني ابن دينار عن عمرو بن عبد الله بن صفوان
أتانا ابن مربع الأنصاري ونحن بعرفة في مكان يباعده عمرو عن الإمام فقال أما إني رسول رسول الله ﷺ إليكم يقول لكم قفوا على مشاعركم فإنكم على إرث من إرث أبيكم إبراهيم
[Sahih] Reported by Tirmidhi, Hajj, chapter on what has been said about standing at Arafat and supplication there, no. 883, Nasai, no. 3017, and Ibn Majah, no. 3011, from the hadith of Sufyan through this same chain. Tirmidhi said, hasan sahih. Ibn Khuzayma graded it sahih, no. 2818, as did Hakim, 1/462, and Dhahabi concurred with him.