The Messenger of Allah ﷺ said, "I will be the first to rise when people are resurrected, their spokesman when they come forth, and the bearer of glad tidings to them when they have lost hope. The Banner of Praise will be in my hand on that day, and I am the most honored of the children of Adam before my Lord, and I say this without boasting."
حدثنا الحسين بن يزيد الكوفي حدثنا عبد السلام بن حرب عن ليث عن الربيع بن أنس
قال رسول الله ﷺ أنا أول الناس خروجا إذا بعثوا وأنا خطيبهم إذا وفدوا وأنا مبشرهم إذا أيسوا لواء الحمد يومئذ بيدي وأنا أكرم ولد آدم على ربي ولا فخر
No references are available.
Sourcing, its chain of transmission is daif. Darimi also narrated it, no. 49, from the hadith of Layth bin Abu Salim, through the same route.