AbuMuhammad fancies that witr prayer is essential. (Hearing this) Ubadah ibn as-Samit said: AbuMuhammad was wrong. I bear witness that I heard the Messenger of Allah ﷺ say: Allah, the Exalted, has made five prayers obligatory. If anyone performs ablution for them well, offers them at their (right) time, and observes perfectly their bowing and submissiveness in them, it is the guarantee of Allah that He will pardon him; if anyone does not do so, there is no guarantee for him on the part of Allah; He may pardon him if He wills, and punish him if He wills. (Using translation from Abū Dāʾūd 425)   

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ خَمْسُ صَلَوَاتٍ افْتَرَضَهُنَّ اللهُ مَنْ أَحْسَنَ وَضُوءَهُنَّ وَصَلَّاهُنَّ لِوَقْتِهِنَّ وَأَتَمَّ رُكُوعَهُنَّ وَسُجُودَهُنَّ وَخُشُوعَهُنَّ كَانَ لَهُ عَلَى اللهِ عَهْدٌ أَنْ يَغْفِرَ لَهُ وَمَنْ لَمْ يَفْعَلْ فَلَيْسَ لَهُ عَلَى اللهِ عَهْدٌ إِنْ شَاءَ غَفَرَ لَهُ وَإِنْ شَاءَ عَذَّبَهُ  

Messenger of Allah ﷺ said: "I have been ordered (by Allah) to fight against the people until they testify that none has the right to be worshipped but Allah and that Muhammad is Messenger of Allah ﷺ, and offer the prayers perfectly and give the obligatory charity, so if they perform that, then they save their lives and property from me except for Islamic laws and then their reckoning (accounts) will be done by Allah." (Using translation from Bukhārī 25)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَشْهَدُوا أَنْ لَا إِلَهَ إِلَّا اللهُ وَأَنَّ مُحَمَّدًا رَسُولُ اللهِ وَيُقِيمُوا الصَّلَاةَ وَيُؤْتُوا الزَّكَاةَ؛ فَإِذَا فَعَلُوا ذَلِكَ عَصَمُوا مِنِّي دِمَاءَهُمْ وَأَمْوَالَهُمْ إِلَّا بِحَقِّ الْإِسْلَامِ وَحِسَابُهُمْ عَلَى اللهِ  

[Machine] That the Messenger of Allah ﷺ was sitting among the people when a man came to seek his permission to kill a hypocrite. The Messenger of Allah ﷺ granted him permission, and the man killed the hypocrite. The Messenger of Allah ﷺ then raised his voice and said, "Is it not witnessed that there is no god but Allah?" He replied, "Yes, it is witnessed, but he does not have the right to testify." The Messenger of Allah ﷺ then asked, "Is it not witnessed that Muhammad is the Messenger of Allah?" He replied, "Yes, it is witnessed, but he does not have the right to testify." The Messenger of Allah ﷺ then asked, "Does he not pray?" He replied, "Yes, he does, but he does not have the right to pray." The Messenger of Allah ﷺ said, "Those are the ones I have forbidden to be killed. This is the narration of Al-Qattan."  

أَنَّ رَسُولَ اللهِ ﷺ بَيْنَا هُوَ جَالِسٌ بَيْنَ ظَهْرَانَيِ النَّاسِ جَاءَ رَجُلٌ يَسْتَأْذِنُهُ أَنْ يُسَارَّهُ فَأَذِنَ لَهُ فَسَارَّهُ فِي قَتْلِ رَجُلٍ مِنَ الْمُنَافِقِينَ يَسْتَأْذِنُهُ فِيهِ فَجَهَرَ رَسُولُ اللهِ ﷺ بِكَلَامِهِ فَقَالَ أَلَيْسَ يَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ ؟ قَالَ بَلَى وَلَا شَهَادَةَ لَهُ قَالَ أَلَيْسَ يَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللهِ ؟ قَالَ بَلَى وَلَا شَهَادَةَ لَهُ قَالَ أَلَيْسَ يُصَلِّي؟ قَالَ بَلَى وَلَا صَلَاةَ لَهُ قَالَ أُولَئِكَ الَّذِينَ نُهِيتُ عَنْ قَتْلِهِمْ لَفْظُ حَدِيثِ الْقَطَّانِ  

[Machine] Narrated Umm Salamah, the wife of the Prophet ﷺ, she said: The Messenger of Allah ﷺ said, "There will be leaders after me whom you will recognize and reject. Whoever denies them, Sulaiman (one of the narrators) said Hisham (another narrator) said in his heart, he will be free (from blame). And whoever dislikes them, he will be safe (from harm). However, whoever accepts and follows them, it was said, 'O Messenger of Allah, should we not fight against them?' He said, 'No, as long as they establish the prayer.'"  

عَنْ أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ ﷺ قَالَتْ قَالَ رَسُولُ اللهِ ﷺ سَيَكُونُ عَلَيْكُمْ أَئِمَّةٌ تَعْرِفُونَ مِنْهُمْ وَتُنْكِرُونَ فَمَنْ أَنْكَرَ قَالَ سُلَيْمَانُ قَالَ هِشَامٌ بِقَلْبِهِ فَقَدْ بَرِئَ وَمَنْ كَرِهَ فَقَدْ سَلِمَ لَكِنْ مَنْ رَضِيَ وَتَابَعَ فَقِيلَ يَا رَسُولَ اللهِ أَوَلَا نُقَاتِلُهُمْ؟ فَقَالَ لَا مَا صَلَّوْا