Invocation for Allah’s protection from the False Messiah
Whoever memorizes ten ‘Ayat (Verses) from the beginning of Surat Al-Kahf, will be protected from the False Messiah if he recites them in every prayer after the final Tashahhud before ending the prayer, seeking the protection of Allah from the trials of the False Messiah.
Reference:
1 Muslim 1/555, another version mentions the last ten ‘Ayat, Muslim 1/556.
2See invocations no. 55 and 56 of this book.