Volume 8, Book 73, Number 213:
Narrated Said bin Al-Musaiyab:
That when his grandfather, Hazn visited the Prophet the Prophet said (to him), “What is your
name?” He said, “My name is Hazn.” The Prophet said, ” But you are Sahl.” He said, “I will not change
my name with which my father named me.” Ibn Al-Musaiyab added: So we have had roughness (in
character) ever since.