Sunan An Nasai 3978

أَخْبَرَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ الْمُغِيرَةِ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ حَدَّثَنَا عُثْمَانُ، ‏‏‏‏‏‏عَنْ شُعَيْبٍ، ‏‏‏‏‏‏عَنِ الزُّهْرِيِّ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ عُتْبَةَ، ‏‏‏‏‏‏أَنَّ أَبَا هُرَيْرَةَ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ لَمَّا تُوُفِّيَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ،‏‏‏‏ وَكَانَ أَبُو بَكْرٍ بَعْدَهُ،‏‏‏‏ وَكَفَرَ مَنْ كَفَرَ مِنَ الْعَرَبِ، ‏‏‏‏‏‏قَالَ عُمَرُ:‏‏‏‏ يَا أَبَا بَكْرٍ كَيْفَ تُقَاتِلُ النَّاسَ،‏‏‏‏ وَقَدْ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:‏‏‏‏ أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَقُولُوا:‏‏‏‏ لَا إِلَهَ إِلَّا اللَّهُ، ‏‏‏‏‏‏فَمَنْ قَالَ:‏‏‏‏ لَا إِلَهَ إِلَّا اللَّهُ فَقَدْ عَصَمَ مِنِّي،‏‏‏‏ مَالَهُ،‏‏‏‏ وَنَفْسَهُ إِلَّا بِحَقِّهِ،‏‏‏‏ وَحِسَابُهُ عَلَى اللَّهِ عَزَّ وَجَلَّ . قَالَ أَبُو بَكْرٍ:‏‏‏‏ لَأُقَاتِلَنَّ مَنْ فَرَّقَ بَيْنَ الصَّلَاةِ وَالزَّكَاةِ، ‏‏‏‏‏‏فَإِنَّ الزَّكَاةَ حَقُّ الْمَالِ، ‏‏‏‏‏‏فَوَاللَّهِ لَوْ مَنَعُونِي عَنَاقًا كَانُوا يُؤَدُّونَهَا إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَقَاتَلْتُهُمْ عَلَى مَنْعِهَا. قَالَ عُمَرُ:‏‏‏‏ فَوَاللَّهِ مَا هُوَ إِلَّا أَنْ رَأَيْتُ اللَّهَ شَرَحَ صَدْرَ أَبِي بَكْرٍ لِلْقِتَالِ فَعَرَفْتُ أَنَّهُ الْحَقُّ.

It was narrated that Abu Hurairah said: When the Messenger of Allah [SAW] died, and Abu Bakr (became Khalifah) after him, and the 'Arabs reverted to Kufr, 'Umar said: 'O Abu Bakr, how can you fight the people when the Messenger of Allah [SAW] said: I have been commanded to fight the people until they say La ilaha illallah, and whoever says La ilaha illallah, his wealth and his life are safe from me, except for a right that is due, and his reckoning will be with Allah, the Mighty and Sublime?' Abu Bakr said: 'I will fight whoever separates Salah and Zakah, for Zakah is the compulsory right to be taken from wealth. By Allah, if they withhold from me a young goat that they used to give to the Messenger of Allah [SAW], I will fight them for withholding it.' 'Umar said: 'By Allah, as soon as I saw that Allah has expanded the chest of Abu Bakr to fighting, I knew that it was the truth.'