Allah 's Apostle said, " I have been ordered to fight with the people till they say, 'None has the right to be worshipped but Allah,' and whoever says, 'None has the right to be worshipped but Allah,' his life and property will be saved by me except for Islamic law, and his accounts will be with Allah, (either to punish him or to forgive him.)" (Using translation from Bukhārī 2946)   

أَخْبَرَهُ أَنَّ رَسُولَ اللهِ ﷺ قَالَ أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَقُولُوا لَا إِلَهَ إِلَّا اللهُ فَمَنْ قَالَ لَا إِلَهَ إِلَّا اللهُ فَقَدْ عَصَمَ مِنِّي نَفْسَهُ وَمَالَهُ إِلَّا بِحَقِّهِ وَحِسَابُهُ عَلَى اللهِ  

"I came with Ali bin Abi Talib when the Messenger of Allah sent him to the people of Makkah with news of the dissolution of treaty obligations." He said: "How did you announced that no one would enter Paradise but a believing soul, no one was to circumambulate the House naked: whoever had a treaty with the Messenger of Allah, then for its period, or, it extended to four months, and when four months had passed, and that Allah is free from (all) obligations to the idolaters and so is His Messenger. No idolater was to perform Hajj after this year. I kept on announcing it until my vice grew hoarse." (Using translation from Nasāʾī 2958)   

كُنْتُ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ ؓ حَيْثُ بَعَثَهُ رَسُولُ اللهِ ﷺ بِبَرَاءَةٍ إِلَى الْمُشْرِكِينَ وَكُنْتُ أُنَادِي حَتَّى صَحِلَ صَوْتِي قُلْتُ يَا أَبِي بِأِيِّ شَيْءٍ كُنْتَ تُنَادِي؟ قَالَ أَمَرَنَا أَنْ نُنَادِي أَنَّهُ لَا يَدْخُلُ الْجَنَّةَ إِلَّا مُؤْمِنٌ وَمَنْ كَانَ بَيْنَهُ وَبَيْنَ رَسُولِ اللهِ ﷺ عَهْدٌ فَأَجَلُهُ إِلَى أَرْبَعَةِ أَشْهُرٍ فَإِذَا مَضَتِ الْأَرْبَعَةُ أَشْهُرٍ فَإِنَّ اللهَ بَرِيءٌ مِنَ الْمُشْكِرِينَ وَرَسُولُهُ وَلَا يَطُوفَنَّ بِالْكَعْبَةِ بَعْدَ الْعَامِ مُشْرِكٌ أَوْ بَعْدَ الْيَوْمِ مُشْرِكٌ