Sahih Muslim, 124

It is narrated on the authority of Abu Huraira that when the Messenger of Allah (ﷺ) breathed his last and Abu Bakr was appointed as his successor (Caliph), those amongst the Arabs who wanted to become apostates became apostates. 'Umar b. Khattab said to Abu Bakr:Why would you fight against the people, when the Messenger of Allah declared: I have been directed to fight against people so long as they do not say: There is no god but Allah, and he who professed it was granted full protection of his property and life on my behalf except for a right? His (other) affairs rest with Allah. Upon this Abu Bakr said: By Allah, I would definitely fight against him who severed prayer from Zakat, for it is the obligation upon the rich. By Allah, I would fight against them even to secure the cord (used for hobbling the feet of a camel) which they used to give to the Messenger of Allah (as zakat) but now they have withheld it. Umar b. Khattab remarked: By Allah, I found nothing but the fact that Allah had opened the heart of Abu Bakr for (perceiving the justification of) fighting (against those who refused to pay Zakat) and I fully recognized that the (stand of Abu Bakr) was right

Rapporté par Abu Huraira رضي الله عنه : Lorsque le Messager d’Allah ﷺ est décédé et qu’Abu Bakr est devenu calife, certains Arabes voulurent quitter l’islam. ‘Umar ibn al-Khattab dit à Abu Bakr : « Pourquoi veux-tu combattre ces gens alors que le Messager d’Allah a dit : “J’ai reçu l’ordre de combattre les gens jusqu’à ce qu’ils disent : Il n’y a pas d’autre dieu qu’Allah, et celui qui le dit a la protection de ses biens et de sa vie de ma part, sauf pour un droit. Le reste de ses affaires dépend d’Allah.” » Abu Bakr répondit : « Par Allah, je combattrai quiconque sépare la prière de la Zakat, car la Zakat est une obligation pour les riches. Par Allah, je les combattrai même pour récupérer la corde qu’ils donnaient au Messager d’Allah comme Zakat, mais qu’ils refusent maintenant de donner. » ‘Umar ibn al-Khattab déclara : « Par Allah, j’ai compris qu’Allah avait ouvert le cœur d’Abu Bakr pour comprendre la nécessité de combattre (ceux qui refusent de payer la Zakat), et j’ai reconnu que sa position était juste. »