I have been commanded to fight the people until they testify that there is none worthy of worship besides Allāh, and that Muhammad is indeed the Messenger of Allāh, and establish prayer, and give Zakah. So when they do these things, they will have protected their lives and their wealth from me, except by the right of Islam, and their reckoning is upon Allāh.
حَدَّثَنَا عَبْدُ اللهِ بْنُ مُحَمَّدٍ الْمُسْنَدِيُّ قَالَ: حَدَّثَنَا أَبُو رَوْحٍ الْحَرَمِيُّ بْنُ عُمَارَةَ قَالَ: حَدَّثَنَا شُعْبَةُ، عَنْ وَاقِدِ بْنِ مُحَمَّدٍ قَالَ: سَمِعْتُ أَبِي يُحَدِّثُ عَنِ ابْنِ عُمَرَ : 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.
Reference: Sahih Al Bukhari 25