The Prophet ﷺ said, "On the Day of Resurrection, a banner will be raised for the treacherous one, and it will be said, 'This is the treachery of so-and-so, son of so-and-so.'"
حدثنا يحيى عن عبيد الله عن نافع
عن النبي ﷺ قال الغادر يرفع له لواء يوم القيامة يقال هذه غدرة فلان بن فلان
Its isnad is sahih. Muslim reported it 2:47 through several routes from Ubaydullah from Nafi, through several routes from Nafi, and through several routes from Ibn Umar, with similar wording.Its meaning has already been mentioned several times through the hadith of Ibn Masud, the last of which were 4201 and 4202.