 sahl bin harun said to alfadl bin sahl the chamberlain is one of the two faces of the king and his kindness is considered and he is affected by what is in his roughness and rudeness. so choose for your chamberlain someone who is easygoing by nature known for his kindness and familiar with it.
وقال سهل بن هارون للفضل بن سهل إن الحاجب أحد وجهي الملك، يعتبر عليه برأفته، ويلحقه ما كان في غلظته وفظاظته. فاتخذ حاجبك سهل الطبيعة، معروفا بالرأفة، مألوفا منه