Sunan an-Nasa'i, Hadith 3974 ⓘ
Abu Hurairah narrated that : The Messenger of Allah [SAW] said: "I have been commanded to fight the people until they say La ilaha illallah, and whoever says it, his life and his wealth are safe from me, except for a right that is due, and his reckoning will be with Allah."
أَخْبَرَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ الْمُغِيرَةِ، قَالَ حَدَّثَنَا عُثْمَانُ، عَنْ شُعَيْبٍ، عَنِ الزُّهْرِيِّ، قَالَ حَدَّثَنِي سَعِيدُ بْنُ الْمُسَيَّبِ، أَنَّ أَبَا هُرَيْرَةَ، أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَقُولُوا لاَ إِلَهَ إِلاَّ اللَّهُ فَمَنْ قَالَهَا فَقَدْ عَصَمَ مِنِّي نَفْسَهُ وَمَالَهُ إِلاَّ بِحَقِّهِ وَحِسَابُهُ عَلَى اللَّهِ " . خَالَفَهُ الْوَلِيدُ بْنُ مُسْلِمٍ .
also referenced under: Book 37, Hadith 9 (In-Book) & Volume 5, Book 37, Hadith 3979 (DarusSalam)