Sayyiduna Hudhayfah (may Allah be pleased with him) narrates this as a marfu' hadith (traced to the Prophet): The Prophet (peace and blessings be upon him) said: "Through the intercession of the intercessors, Allah Almighty will bring out (that is, from Hell) people who will have become foul-smelling and whom the Fire will have burnt to ashes. They will enter Paradise and will be given the name 'al-Jahannamiyyun' (the people of Hell)."
Ahmad recorded it through two routes, and the narrators of both are the narrators of the Sahih. (Allamah al-Haythami says:) I say: Some hadiths of this kind will come later in the chapter on the mercy of Allah Almighty.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البعث / 18537
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه احمد فى المسند (391/5) ، أخرجه مسند أحمد برقم: 22914، وأخرجه المطالب العالية بزوائد المسانيد الثمانية برقم: 4561، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 7773»