From GameWinners
Mehrunes' Razor
To get the legendary item Mehrunes' Razor, go west
from Khul. You will find a Deadric shrine. Pass it and continue
west until you reach the last Deadric shrine in the area. Go in,
kill the occupants, and approach the statue. It should say "Mehrunes
Dagon". Press A and he will tell you about Mehrunes'
Razor, and how it has fallen into unworthy hands. He will tell
you that the former owner is now dead and that the razor now lies
in Alas tomb. The tomb is near Molag Marr. Search around until
you find it.