How authentic is the Hadith: "Do not forget the two mighty ones: Paradise and Hellfire"?

The summary of the Fatwa:

The Hadith narrated from the Prophet, peace and blessings be upon him, with the wording: (Do not forget the two mighty ones: Paradise and Hell), revolves around Ayyub ibn Shabeeb al-San'ani, whom Ibn Hibban described as "making mistakes." Sheikh al-Albani deemed the Hadith weak because Ayyub ibn Shabeeb al-San'ani is "unknown in person." Therefore, the Hadith is weak, and its meaning is sufficiently covered by the many texts of revelation that encourage remembrance of the Hereafter, Paradise, and Hell.