It was narrated that Anas bin Malik said:

"When the Messenger of Allah ﷺ died, some of the 'Arabs apostatized. 'Umar said: 'O Abu Bakr, how can you fight the 'Arabs? Abu Bakr said: 'The Messenger of Allah ﷺ said: I have been commanded to fight the people until they testify that La ilaha illallah (there is none worthy of worship except Allah) and that I am the Messenger of Allah, and establish prayer and pay Zakah?' By Allah, if they withhold from me a small she-goat that they used to give to the Messenger of Allah ﷺ I will fight them for withholding it.' ('Umar siad) 'By Allah, when I realized that (Abu) Bakr was confident about this idea, then I knew that this was teh truth.'"
Abu 'Abdur-Rahman (An-Nasa'i) said: 'Imran Al Qattan is not strong in Hadith, and this narration is a mistake. The one that is before it is the correct narration of Az-Zuhri, from 'Ubaidullah bin 'Abdullah bin 'Utbah, from Abu Hurairah.

أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا عَمْرُو بْنُ عَاصِمٍ، قَالَ حَدَّثَنَا عِمْرَانُ أَبُو الْعَوَّامِ الْقَطَّانُ، قَالَ حَدَّثَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ لَمَّا تُوُفِّيَ رَسُولُ اللَّهِ ﷺ ارْتَدَّتِ الْعَرَبُ قَالَ عُمَرُ يَا أَبَا بَكْرٍ كَيْفَ تُقَاتِلُ الْعَرَبَ فَقَالَ أَبُو بَكْرٍ رَضِيَ اللَّهُ عَنْهُ إِنَّمَا قَالَ رَسُولُ اللَّهِ ﷺ " أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَشْهَدُوا أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنِّي رَسُولُ اللَّهِ وَيُقِيمُوا الصَّلاَةَ وَيُؤْتُوا الزَّكَاةَ " . وَاللَّهِ لَوْ مَنَعُونِي عَنَاقًا مِمَّا كَانُوا يُعْطُونَ رَسُولَ اللَّهِ ﷺ لَقَاتَلْتُهُمْ عَلَيْهِ . قَالَ عُمَرُ رضى الله عنه فَلَمَّا رَأَيْتُ رَأْىَ أَبِي بَكْرٍ قَدْ شُرِحَ عَلِمْتُ أَنَّهُ الْحَقُّ . قَالَ أَبُو عَبْدِ الرَّحْمَنِ عِمْرَانُ الْقَطَّانُ لَيْسَ بِالْقَوِيِّ فِي الْحَدِيثِ وَهَذَا الْحَدِيثُ خَطَأٌ وَالَّذِي قَبْلَهُ الصَّوَابُ حَدِيثُ الزُّهْرِيِّ عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ عَنْ أَبِي هُرَيْرَةَ .