Abu Ishaq al Fazari says that Abu Hanifa use to say: The faith of Iblees and the faith of Abu Bakr al-Siddiq (RA) is one. Abu Bakr said: O God, and Ibless said: O God.
Ref: Tarikh Baghdad, volume 13, page 373, published in Dar al kutub al ‘arabi, Beirut Lebanon.
Abdullah bin Ahmad bin Hanbal writes in his Al Sunnah, volume 1, in 1/219 you find the same hadith.
Researcher of book, Mohammad Saeed Salim says: Isnaad Sahih