If it is a hunting type knife the answer is sheath.
Scabbard
A scabbard is a sheath for holding a sword, knife, or some other blade, which can be made from leather, wood, or metal - such as brass or steel.
The scabbard is used to hold a sword or dagger.
sword
A scabbard is a sheath for holding a sword.
. = Scabbard. =
you would expect to find a sword or a dagger at a scabbard.
scabbard
A frog is the attachment to hold the sword scabbard to the belt.
scabbard... the lightining sword given to perseus by zeus
As long as Arthur has the scabbard he can't be killed.
The scabbard and belt were used during medieval times. The scabbard holds the sword and the belt wraps around the wearer to hold the scabbard.