Sa'id ibn al-Musayyab reported that his grandfather went to the
Prophet, may Allah bless him and grant him peace. He asked, "What is your
name?" "Hazn (rough)," he replied. The Prophet said, "You are Sahl (easy)."
He said, "I will not change a name which my father gave me." Ibn al-Musayyab
said, "Roughness (hazuna) remained among us afterwards."