Imam al-Tabarani also recorded this narration in al-Mu'jam al-Awsat, and the words of his narration are: The narrator says: The Prophet (peace and blessings be upon him) said: "O people of Madinah, remember the Day of Deliverance!" The people asked: "What is meant by the Day of Deliverance?" The Prophet (peace and blessings be upon him) said: "The Dajjal will come and camp at a place called 'Dhubab'. At that time every polytheist man and polytheist woman, disbeliever man and disbeliever woman, hypocrite man and hypocrite woman, and sinful man and sinful woman in Madinah will go out and go over to him, and only the Muslims will remain. That is the Day of Purification" (and the rest of the hadith).
The narrators of Imam Ahmad are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5830
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الاوسط ( 2186)»