Musnad Ahmad 30:1257

Abu al-Nadr narrated to us, Abu Sa’id—meaning the tutor, and his name is Muhammad ibn Muslim ibn Abi al-Waddah Abu Sa’id the tutor, and Abd al-Rahman ibn Mahdi, Abu Dawud, and Abu Kamil narrated from him—said: Hisham narrated to us, from his father, from Abu Hurayrah, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Indeed, Satan comes to one of you and says: 'Who created the heaven?' He says: 'Allah, the Almighty and Majestic.' He says: 'Who created the earth?' He says: 'Allah.' He says: 'Who created Allah?' So when one of you perceives anything of that, let him say: 'I believe in Allah and His messengers.'"