Betrayers Humiliated

The Messenger of Allah (sal Allahu alaihi wa sallam) said: “When Allah gathers the first and the last on the Day of Resurrection, a banner will be raised for every betrayer, and it will be said, ‘This is the betrayer of So and so, the son of So and so.’” [Muslim]

A betrayer is one who makes a promise then does not fulfill it, or whose loyalty and support is counted on but who does not deliver it.

For example, your sister in Islam is in dire straits and instead of helping her you turn your eyes away from her. She had the right to expect your help, because Allah (subhana wa ta’ala) had enjoined it upon you, calling the Muslim Ummah one body. But if you neglected to help her, then you betrayed her.

A banner is a large flag which is carried by the leader of the army at war, or the standard-bearer of an army, so that people follow him. [Sharh an-Nawawi ala Muslim]

So a banner will be erected for every betrayer, on which his/her betrayal will be written, and they will be exposed on the Day of Resurrection. This banner will be placed at their back. [Muslim]