From Sahih Muslim (Hadith 1326):
Abu Huraira reported:The Messenger of Allah (ﷺ) said: When any one of you completes the last tashahhud. he should seek refuge with Allah from four (trials). I.e. from the torment of Hell, from the torment of grave, from the trial of life and death, and from the mischief of Masih at-Dajjal (Antichrist). This hadith has been narrated by al-Auza'i with the same chain of transmitters but with these words:" When any one of you completes the tashahhud" and he made no mention of the words" the last
Reference: Muslim 1326