The Saqifah, the army of Usamah, the people who withheld zakah, the ridda, Yamamah, the gathering of the Quran. Tabari is a chief source for the ridda campaigns. The sahihayn confirm Abu Bakr’s khilafah and the collecting of the mushaf under him, as Zayd later told it.
Abu Bakr said: By Allah, I will fight whoever distinguishes between salah and zakah. Zakah is the right of wealth. By Allah, if they withheld from me a young goat they used to give the Messenger of Allah ﷺ, I would fight them for it.
Bukhari · Muslim — Tabari in the first year of the khilafah
Umar pointed to the dead of Yamamah and the Quran in the breasts of men. Abu Bakr charged Zayd ibn Thabit. Zayd said: by Allah, had they charged me with moving a mountain it would not have been heavier. Then he gathered it from palm-stalks and the chests of men.
Bukhari — the collecting; Tabari under 12 AH
How to weigh this
Ridda-lists and the names of false prophets are Tabari’s strength. Some campaign-details come on single roads. The decision of Abu Bakr to fight is sahih, and it saved the salah and the zakah as one din.