Musannaf Ibn Abi Shayba 37:558

Ghundar narrated to us, from Shu'bah, who said: I heard Simak bin Harb, who said: I heard Hanzalah bin Fattan, Abu Muhammad, from the tribe of Banu 'Amir bin Dhuhl, who said: 'Uthman looked down upon us from a window while he was besieged and said: "Are the two sons of Majduh among you?" They were not there, then they were sleeping, so they were awakened and came. 'Uthman said to them: "I adjure you by Allah, do you not know that 'Umar said: 'Rabi'ah is only a transgressor or a traitor, and by Allah, I will not make their shares equal to the shares of a people who came from a month's journey, one of whom migrated at Tanbah'? Then I increased them in one morning by five hundred [dirhams] each, until I made them equal to them." They said: "Yes." He said: "I adjure you by Allah, do you not know that you came to me and said: 'Kindah are head-eaters, and Rabi'ah are the head, and Al-Ash'ath bin Qays has eaten them,' so I removed him and appointed you both?" They said: "Yes." He said: "O Allah, O Allah, if they have denied my kindness and changed my favor, then do not make them pleased with an Imam, and do not make the Imam pleased with them."