Once, a friend went home and explained to his 6 year old son about Dajjal to make him realize the tough times that his generation might face.

Father (in a fearful voice) :

Dajjal can go anywhere but he cannot enter Makkah and Madinah.

Son (speaking confidently) :

Of course Dajjal wouldn’t be able to enter Makkah and Madinah.

Father (curious) :

How come ?!?

Son (calm) :

Because when he would reach the check post, the police would check his residence permit, on which his name “Dajjal” would be written. So, they would immediately arrest him.

Commentary

These are related hadith from Sahih Al-Bukhari

Narrated Anas bin Malik:

The Prophet (SAW) said, “There will be no town which Ad-Dajjal will not enter except Mekkah and Madinah, and there will be no entrance (road) (of both Mekkah and Madinah) but the angels will be standing in rows guarding it against him, and then Madinah will shake with its inhabitants thrice (i.e. three earth-quakes will take place) and Allah (SWT) will expel all the non-believers and the hypocrites from it.

Volume 3, Book 30, Number 105

Narrated Abu Bakr (RA) :

The Prophet (SAW) said, “The terror caused by Al-Masih Ad-Dajjal will not enter Madinah and at that time Madinah will have seven gates and there will be two angels at each gate guarding them.

Volume 3, Book 30, Number 103

Narrated Ibn Abbas (RA) :

The Prophet (SAW) said, “On the night of my Ascent to the Heaven, I saw Musa (Moses) who was a tall brown curly-haired man as if he was one of the men of Shan’awa tribe, and I saw ‘Isa (Jesus), a man of medium height and moderate complexion inclined to the red and white colors and of lank hair. I also saw Malik, the gate-keeper of the (Hell) Fire and Ad-Dajjal amongst the signs which Allah showed me.” (The Prophet (SAW) then recited the Holy Verse) : “So be not you in doubt of meeting him’ when you met Moses during the night of Mi’raj over the heavens” (32.23)

Volume 4, Book 54, Number 462

Narrated Abu Hurairah (RA):

The Prophet (SAW) said, “Neither Messiah (Ad-Dajjal) nor plague will enter Medina.

Volume 7, Book 71, Number 627