'Abdullah reported Allah's Prophet (ﷺ) as saying: There will be a flag for every perfidious person on the Day of Judgment, and it would be said: Here is the perfidy of so and so.
Hadith Referenceصحيح مسلم / كتاب الجهاد والسير / 1736
It has been narrated on the authority of'Abdullah that the Messenger of Allah (ﷺ) said: There will be for every perfidious person on the Day of Judgment a flag by which he will be recognised. It will be announced: Here is the breach of faith of so and so.
Hadith Referenceصحيح مسلم / كتاب الجهاد والسير / 1736
´It was narrated from ‘Abdullah that the Messenger of Allah (ﷺ) said:` “A banner will be set up for every traitor on the Day of Resurrection, and it will be said: ‘This is the treachery of so-and- so.’”
Maulana Ataullah Sajid
Benefits and Issues:
➊ After pledging allegiance to the legitimate Islamic ruler and caliph, breaking that allegiance is a very grave sin.
➋ On the Day of Resurrection, such a criminal will face great disgrace and humiliation.
➌ A flag is something that can be seen from afar; therefore, the rebellion against the legitimate caliph will be widely publicized. People will see from a distance and say, “This person was a traitor. This flag is the proclamation of his treachery.”
➍ The punishment for some sins will be given in the plain of resurrection (mahshar) itself, even before entering Hell.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 2872