Masih ad-Dajjal is an evil figure in Islamic eschatology. He is to appear pretending to be Masih at a time in the future, before Yawm al-Qiyamah (The Day of Resurrection, Judgment Day).
Dajjal is a common Arabic word, used in the sense of "false prophet", but al-Masih ad-Dajjal, with the definite article, refers to "the impostor", a specific end-of times deceiver. The term al-Masīḥ ad-Dajjāl (Arabic for "the false messiah") is a literal translation of the Syriac term Mšīḥā Daggālā, which had been in the common vocabulary of the Middle East and adapted into the Arabic language 400 years prior to the Qur'an via the Peshitta (which uses that term instead of the Greek "Antichristos")
The belief is based around the events prior to the Day of Judgment around the Second Coming of The Christ, when ad-Dajjal who is blind in his right eye, shall gather an army of those he has deceived and lead them in a war against Jesus, who shall be accompanied by an army of the righteous. He will appear somewhere between Syria and Iraq, at which time Jesus will return and Imam Mahdi will defeat ad-Dajjal in Palestine. He will travel the whole world in forty days preaching his falsehood but will be unable to enter Makkah or Madinah.
Hadith attributed to Muhammad give many signs of the appearance of the Dajjal, and exhorted his followers to recite the first and last ten verses of Sura Al-Kahf, as protection from the trials and mischief of the Dajjal. It is said that he will have one eye damaged and the other will be working. It is also said that he will have the word " kafir" on his forehead. There is nothing in the Islamic Holy Book, the Qur'an which mentions any such an events or characters; neither the events of the coming of an Imam Mahdi, the Dajjal, or Jesus returning prior to the day of resurrection when all human beings return from death to be judged before Allah.
The Qur'an doesn't mention the Dajjal by name, like the Hadith. A couple of hadith describe the Dajjal as follows:
- The Prophet mentioned the Massiah Ad-Dajjal in front of the people saying the Ad-Dajjal is blind in the right eye and his eye looks like a bulging out grape. While sleeping near the Ka'ba last night, I saw in my dream a man of brown color the best one can see amongst brown color and his hair was long that it fell between his shoulders. His hair was lank and water was dribbling from his head and he was placing his hands on the shoulders of two men while circumambulating the Kaaba. I asked, 'Who is this?' They replied, 'This is Jesus(Isa), son of Mary(Maryam).' Behind him I saw a man who had very curly hair and was blind in the right eye, resembling Ibn Qatan (i.e. an infidel) in appearance. He was placing his hands on the shoulders of a person while performing Tawaf around the Ka'ba. I asked, 'Who is this? 'They replied, 'The Masih, Ad-Dajjal.' "
- Once Allah's Apostle stood amongst the people, glorified and praised Allah as He deserved and then mentioned the Dajjal saying, "l warn you against him (i.e. the Dajjal) and there was no prophet but warned his nation against him. No doubt, Noah warned his nation against him but I tell you about him something of which no prophet told his nation before me. You should know that he is one-eyed"
- Muhammad told his companions: "Every Messenger of Allah did warn his nation about the trials of Dajjal. Allah, however, delayed Dajjal’s birth and did not let him appear until now. Be aware! he will claim to be God and try to create doubts in your minds. Have a firm belief, the one-eyed creature cannot be your Lord. He will come out riding on a 'donkey', which will have a distance of one mile between its two ears. He will claim to have come with the gifts of paradise and arsenal of hell."
- Alī was reported to have said: "His right eye will be punctured, and his left eye would be raised to his forehead and will be sparkling like a star. Everyone will be able to read the word ‘Kāfir’ [disbeliever], inscribed in bold letters, within his two eyes. There will be big mountains of smoke at both front and backsides of his caravan. People will anticipate food within those mountains, during the severe famine. He will be riding on a huge white coloured 'donkey' who will cover a mile in a single stride. All rivers, falling in his way, will become dry and he will call upon people in aloud voice, ‘O my friends come to me! I am your lord who has made your limbs and given you sustenance.