It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "I have been commanded to fight the people until they declare «لاَ إِلَهَ إِلَّا اللَّهُ» ; when they say this statement, they will protect their blood and wealth from me, except by its right, and their reckoning is with Allah the Exalted." When, during the time of Sayyiduna Abu Bakr (may Allah be pleased with him), people began to refuse zakat and (Sayyiduna Abu Bakr wanted to fight such people), Sayyiduna Umar (may Allah be pleased with him) said to him: "How will you fight these people, when I heard the Messenger of Allah (peace and blessings be upon him) say (that after «لاَ إِلَهَ إِلَّا اللَّهُ» , wealth and blood are protected)?" But Sayyiduna Abu Bakr (may Allah be pleased with him) said: "By Allah! We will fight such people. I do not differentiate between prayer and zakat, and I will fight the one who differentiates between them." Sayyiduna Umar (may Allah be pleased with him) said: "Then we fought such people along with Sayyiduna Abu Bakr (may Allah be pleased with him), and we realized that this matter was indeed guidance."