Sayyiduna Imran bin Husayn (may Allah be pleased with him) narrated: I heard the Prophet (peace and blessings be upon him) say: "Whoever knows that Allah Almighty is his Lord and that I am His Prophet, and (affirms this) with a truthful heart" - the Prophet (peace and blessings be upon him) said this while pointing to his chest - "then Allah Almighty makes his flesh forbidden to the Fire."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain contains a narrator, Umar bin Muhammad bin Umar bin Safwan, who is wahi al-hadith (very weak in hadith).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الإيمان / 25
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«اخرجه الامام الطبراني فى معجمه الكبير 124/18 كشف 14»