Sunan Ibn Majah, Hadith 72 ⓘ
It was narrated that Mu'adh bin Jabal said: "The Messenger of Allah said: 'I have been commanded to fight the people until they testify to La ilaha ill-allah (none has the right to be worshipped but Allah) and that I am the Messenger of Allah, and establish regular prayers and pay Zakat.'"
حَدَّثَنَا أَحْمَدُ بْنُ الأَزْهَرِ، حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، حَدَّثَنَا عَبْدُ الْحَمِيدِ بْنُ بَهْرَامَ، عَنْ شَهْرِ بْنِ حَوْشَبٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ غَنْمٍ، عَنْ مُعَاذِ بْنِ جَبَلٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " أُمِرْتُ أَنْ أُقَاتِلَ النَّاسَ حَتَّى يَشْهَدُوا أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنِّي رَسُولُ اللَّهِ وَيُقِيمُوا الصَّلاَةَ وَيُؤْتُوا الزَّكَاةَ " .
also referenced under: Book 1, Hadith 76 (In-Book) & Volume 1, Book 1, Hadith 72 (DarusSalam)