المحسن
كلمة (المحسن) في اللغة اسم فاعل من الإحسان، وهو إما بمعنى إحسان...
Umm Ad-Dardā’ (may Allah be pleased with her) reported that the Prophet (may Allah's peace and blessings be upon him) said: “The supplication of a Muslim for a fellow Muslim in his absence is answered. At his head, there is an entrusted angel. Whenever one invokes good for his brother, the entrusted angel says: 'Amen, and likewise to you.'"
شرح الحديث :
Allah accepts the invocation that a Muslim makes for his brother, who is absent and does not know about it. So when he supplicates, an angel stands at his head and says, “Amen,” that may you have the same good that you have invoked for your brother.