Sahih al-Bukhari & Sahih Muslim

الْمُسْلِمُ أَخُو الْمُسْلِمِ لَا يَظْلِمُهُ وَلَا يُسْلِمُهُ

“A Muslim is the brother of a Muslim. He does not oppress him, nor does he abandon him.”

— Sahih al-Bukhari & Sahih Muslim, Bukhari 2442, Muslim 2580