What kind of figure of speech is this sentence o death is thy sting o grave where is thy victory?

The sentence "O death, where is thy sting? O grave, where is thy victory?" employs apostrophe, a figure of speech in which the speaker addresses an absent or imaginary person or a personified abstraction. In this case, death and the grave are personified and spoken to as if they can hear and respond. This rhetorical device emphasizes the themes of mortality and triumph over death, often associated with religious or philosophical contexts.