Did Abu Bakr, Umar, and Aisha seek repentance prior to their death? If so, could you kindly provide book references for further reading on the subject?
Neither Shia scholars nor our Sunni brothers have any authentic evidence that those persons of Saqeefa who did what they did against Fatima (AS) , had repented. Those who claim their repentance failed since 14 centuries to prove such repentance.
Ahlul Bayt (AS) have clearly mentioned that :Our Mother Fatima left this life while being angry on such persons and we don't have any evidence that she ever forgave them.
A book of Seven from the Salaf by Fairizabadi السبعة من السلف has details from Sunni books to prove our stand.
Wassalam.