(4) باب تَحْرِيمِ الْغَدْرِ
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.
Reference: Sahih Muslim 1736 c
In-book reference: Book 32, Hadith 16
USC-MSA web (English) reference(deprecated numbering scheme): Book 19, Hadith 4307