It is narrated from Sayyiduna Ibn Mughaffal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "He has certainly eaten food and walked in the markets." That is, he (peace and blessings be upon him) meant the Dajjal.
Imam al-Tabarani (may Allah have mercy on him) said: "Muhammad bin Abbad narrated it this way from Sufyan (may Allah have mercy on him), 'from Ibn Mughaffal', whereas al-Humaydi, Ali bin al-Madini (may Allah have mercy on them both) and other imams narrated it from Sufyan, from Ali bin Zayd, from al-Hasan al-Basri, from Sayyiduna Imran bin Husayn (may Allah be pleased with him)."
Hadith Referenceالمعجم الأوسط / باب الميم / 8154
Hadith Takhrij«أخرجه ابن حجر فى «المطالب العالية» برقم: 4524»