Sayyiduna Abu Bakr (may Allah be pleased with him) said: "When the people refused to give zakat, I intended to fight them." It was said: "Did not the Messenger of Allah (peace and blessings be upon him) say that I have been commanded to fight the people until they say 'La ilaha illallah', and when they say it, they protect their blood and wealth from me except by its right?" He said: "Giving zakat is also its right, and if they withhold even a single thing which they used to give during the time of the Messenger of Allah (peace and blessings be upon him), I will fight them for it."