Abu Hurayra reported that the Messenger of Allah said,
"Take your protection."
"Messenger of Allah, from an enemy present?"
"No, but your protection against the Fire. Say: 'Subhan'Allaah, La illaha illa llah, and Allahu akbar.' They will come on the Day of Rising in front and behind you. They are lasting righteous ones."
Source: The Chapter on Dhikr from at-Targhib wa at-Tarhib by Ibn Hajar al-'Asqalani (no. 29); an-Nasa'i and al-Bayhaqi. At-Tabarani has it in al-Awsat and adds, "There is no strength or power except by Allah."
Q: Is this hadith sahih?