That's okay, I can quote it for you again.
Exactly how often can a monk attack with a single
manufactured weapon when using the flurry of blows
ability? For example, if I have a +1 alchemical silver dagger,
and I’m allowed three attacks in a flurry, how many of
those attacks can be dagger attacks? What if I have two
daggers? How about with natural weaponry, such as a claw
or bite? For example, if I have a vampire monk, can I
flurry with a slam attack and drain energy multiple times
from one living foe? If natural weaponry doesn’t work with
a flurry, why not?
You can’t use a dagger with a flurry of blows at all. When
you use the flurry ability, you must attack with either unarmed
strikes or with special monk weapons. Only six of the latter are
included in the Player’s Handbook (kama, nunchaku,
quarterstaff, sai, shuriken, and siangham). A natural weapon
(any natural weapon) is neither an unarmed strike nor a special
monk weapon, so you can’t use it along with a flurry.
-Hyp.