Riyad as-Salihin, Book 18, Hadith 1585 (In-Book) ⓘ
Ibn Mas'ud, Ibn 'Umar and Anas (May Allah be pleased with them) said: The Prophet said, "For every one who breaks his covenant, there will be a (huge) flag on the Day of Resurrection and it will be said: 'This flag proclaims a breach of covenant by so-and-so."'[Al-Bukhari and Muslim].
وعن ابن مسعود، وابن عمر، وأنس رضي الله عنهم قالوا: قال النبي صلى الله عليه وسلم : " لكل غادر لواء يوم القيامة، يقال: هذه غدرة فلان" ((متفق عليه)).