What did Abu Bakr say regarding the Zakat if the people withheld even a she-kid that they used to pay during the lifetime of Allah's Apostle (peace be upon him)?
 Narrated Abu Huraira:                     Abu Bakr said, "By Allah! If they (pay me the Zakat and) withhold even a she-kid which they used to pay during the lifetime of Allah's Apostle, I will fight with them for it." `Umar said, "It was nothing but Allah Who opened Abu Bakr's chest towards the decision to fight, and I came to know that his decision was right."