Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Abusing a Muslim is wickedness, and fighting him is disbelief, and the sanctity of his wealth is like the sanctity of his life."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4262
Hadith Gradingحکم دارالسلام:صحيح، وهذا إسناد ضعيف، إبراهيم الهجري لين الحديث، وعلي بن عاصم صدوق يخطئ ويصر على الخطأ.