Musannaf Ibn Abi Shayba 33:575

Waki’ narrated to us, from Isra’il, from Abu Ishaq, from Silah, from Hudhayfah, who said: The people will be gathered on a single level plain; the sight will penetrate them, and the caller will make them hear. Then a caller will call out, "O Muhammad," before the first and the last [of mankind]. He (the Prophet), peace and blessings of Allah be upon him, will say: "At Your service and at Your command, and all good is in Your hands, and evil is not attributed to You. The guided one is he whom You have guided. Blessed are You, our Lord, and Exalted." Hudhayfah said: "That is the Praiseworthy Station (al-Maqam al-Mahmud)."