The Prophet (ﷺ) has taught his ummah about that which will protect them against the fitnah of the false messiah (al-maseeh al-dajjaal). He left his ummah on a path that is clear, and no one deviates from it except the one who is doomed. He did not leave any good thing without pointing it out to his ummah, or any evil thing without warning them against it. Among the things which he warned us against was the fitnah of the Dajjaal, because it is the greatest fitnah which the ummah will face until the Hour comes.
Every Prophet warned his ummah against the one-eyed Dajjaal, but Muhammad (ﷺ) was the only Prophet who warned his ummah more about him. Allaah (ﷻ) told him many of the attributes of the Dajjaal so that he could warn his ummah. The Dajjaal will undoubtedly emerge among this ummah, because it is the last ummah, and Muhammad (ﷺ) is the Seal of the Prophets. There follow some of the Prophetic guidelines which the Prophet (ﷺ) set out for his ummah so that it may be protected against this mighty fitnah, from which we ask Allaah (ﷻ) to save us and grant us refuge:
Adhering to Islam
Having the right faith and learning the Names and Most Beautiful Attributes of Allaah which are not shared by anyone else. One should know that the Dajjaal will be a human being who will eat and drink, and that Allaah is far above that; the Dajjaal will be one-eyed but Allaah is not one-eyed; no one can see his Lord until he dies, but the Dajjaal will be seen by all people, believers and kaafirs alike, when he emerges.
Seeking refuge with Allaah from the fitnah of the Dajjaal
Especially in salaah (prayer). This has been narrated in the saheeh ahaadeeth, such as that narrated from Umm al-Mu’mineen ‘Aa’ishah (رضي الله عنها), the wife of the Prophet (ﷺ), who said that the Messenger of Allaah (ﷺ) used to pray in his salaah:
“Allaahumma inni a’oodhu bika min ‘adhaab al-qabri, wa a’oodhu bika min fitnat il-maseeh il-dajjaal, wa a’oodhu bika min fitnat il-mahyaa wa fitnat il-mamaat. Allaahumma inni a’oodhu bika min al-ma’tham wa’l-maghram.
(O Allaah, I seek refuge with You from the torment of the grave, I seek refuge with You from the fitnah of the Dajjaal, and I seek refuge with You from the trials of life and death. O Allaah, I seek refuge with You from sin and debt).”
(Bukhaari, no. 789)
Muslim narrated that Abu Hurayrah (رضي الله عنه) said: “The Messenger of Allaah (ﷺ) said:
‘When any one of you says Tashahhud, let him seek refuge with Allaah from four things, and say:
“Allaahumma inni a’oodhi bika min ‘adhaab jahannam wa min ‘adhaab al-qabri wa min fitnat il-mahyaa wa’l-mamaat wa min sharri fitnat al-mash al-dajjal
(O Allaah, I seek refuge with You from the torment of Hell, from the torment of the grave, from the trials of life and death, and the evil of the fitnah of the Dajjaal).”
(Muslim, no. 924) إِنْ شَاءَ اَللَّه