It wasnarrated from Abu Sa'eed Al-Khudri that the Messenger of Allah(ﷺ) said:
"For every traitor a banner will be set up on the DayofResurrection, commensurate with his treachery." (DE)
English reference (DE): Vol. 4, Book 24, Hadith 2873 (DE)
Arabic reference (DE): Book 24, Hadith 2983 (DE)