Hadith 1853
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.
Hadith 1990
This hadith has been narrated through another chain of transmitters with a slight variation of words.
Hadith 2218
This hadith has been transmitted by Ibrahim bin Sa'd bin Malik on the authority of his father.