Mukhtasar Bukhari

´Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that` when the Messenger of Allah (peace and blessings of Allah be upon him) passed away and Abu Bakr as-Siddiq (may Allah be pleased with him) became the Caliph, some Arab tribes turned apostate. When Sayyiduna Abu Bakr as-Siddiq (may Allah be pleased with him) intended to fight these apostates, Sayyiduna Umar (may Allah be pleased with him) said, "How can you fight these people when the Messenger of Allah (peace and blessings of Allah be upon him) has said: 'I have been commanded to fight the people until they say La ilaha illallah (there is no god but Allah). So whoever says La ilaha illallah has protected his wealth and his life from me except by right of Islam, and his reckoning is with Allah.'" Sayyiduna Abu Bakr (may Allah be pleased with him) replied, "By Allah! I will surely fight the one who differentiates between prayer and zakat, because zakat is the due right upon wealth. By Allah, if they withhold from me even a young goat which they used to give in zakat during the time of the Messenger of Allah (peace and blessings of Allah be upon him), I will surely fight them for withholding it." Sayyiduna Umar (may Allah be pleased with him) says, "By Allah! It was only due to this (sound judgment and firmness of resolve) that Allah had opened the chest of Abu Bakr (may Allah be pleased with him) (for prudent decision), so I realized that this was the truth."