Ibn Majah
36. Tribulations
سنن ابن ماجه
36/1 Chapter:
Refraining from harming one who says: La Ilaha Illallah
باب الْكَفِّ عَمَّنْ قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ
36/2 Chapter:
The sanctity of the Believer's blood and wealth
باب حُرْمَةِ دَمِ الْمُؤْمِنِ وَمَالِهِ
36/3 Chapter:
The prohibition of plunder
باب النَّهْىِ عَنِ النُّهْبَةِ
36/4 Chapter:
Verbally abusing a Muslim is Fusuq (disobedience) and fighting Him is Kufr (ungratefulness to Allah)
باب سِبَابُ الْمُسْلِمِ فُسُوقٌ وَقِتَالُهُ كُفْرٌ