المتين
كلمة (المتين) في اللغة صفة مشبهة باسم الفاعل على وزن (فعيل) وهو...
Abu Sirmah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Anyone causes harm to a Muslim will be harmed by Allah, and anyone causes hardship to a Muslim will be caused hardship by Allah."
The Hadīth confirms the prohibition of causing harm and hardship to a Muslim, whether it is to the Muslim's body, family, property, or children. It states that anyone causes harm or hardship to a Muslim, Allah will repay him in in the same way. Harm could be a loss of benefit or inflicting damage of any sort. This, for example, includes deception and cheating in transactions, hiding defects, and proposing to a lady whom another Muslim has already proposed to.