(15) باب إِذَا بُويِعَ لِخَلِيفَتَيْنِ
It has been narrated on the authority of Aba Sa'id al-Khudri that the Messenger of Allah (ﷺ) said:
When oath of allegiance has been taken for two caliphs, kill the one for whom the oath was taken later. (ES)
Reference (ES): Sahih Muslim 1853 (ES)
In-book reference (ES): Book 33, Hadith 96 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4568 (ES)