Hazrat Ibn Abi Mulaykah (may Allah have mercy on him) narrates that Hazrat Umar (may Allah be pleased with him) said: If Abu Bakr (may Allah be pleased with him) had obeyed us, we would have fallen into disbelief in a single morning. Because when people asked him to reduce the zakat, he refused to accept their request and said: If they withhold from me even a rope of a camel, I will surely fight against them.