What Allah عز وجل has Forbidden a Believer to do Against a Fellow Believer

Kitāb al-Muʾmin|Volume 1|Book 1|Chapter 8
Kitāb al-Muʾmin

Book 1, Chapter 8

What Allah عز وجل has Forbidden a Believer to do Against a Fellow Believer

185 - وعن المعلي بن خنيس قال: سمعته يقول: إن الله عز وجل يقول: من أهان لي وليا فقد ارصد لمحاربتي، و أنا أسرع شئ إلى نصرة أوليائي.
185. It has been narrated that al-Mu'alla ibn Khunays said: I heard al-Sadiq عليه السلام saying: Most surely, Allah [M.G] has declared: One who humiliates a friend of Mine has prepared for battle against Me; and I am the swiftest of all in coming to My friends' rescue.