The dagger knew too well that Caesar was dangerous is an example of?

The sentence is: "The dagger knew too well that Caesar was dangerous." This statement attributes the human ability of "knowing" to an inanimate object, the dagger.

Attributing human qualities, characteristics, or actions to inanimate objects or abstract ideas is called personification. In this sentence, the dagger, which is an inanimate object, is described as "knowing," a characteristic typically associated with living beings, especially humans.

The literary device is personification.