His boss 'assured' him that he had her continued support. = His boss 'assured' him of her continued support. = “You have my continued support,” his boss 'assured' him.
You can 'rest assured' [=you can be sure] that these mistakes won't happen again. = 'Rest assured', these mistakes won't happen again.
They are not 'assured of' being paid. [=it is not certain that they will be paid]
(..) There is no conflict, and any claim there could be is irresponsible. Now hold on. I just met with law enforcement officials and they... assured me that they have their very best men on this. This will be the very definition... of swift justice. GREED Pardon me, George. (..)1995 Se7en