Final answer:
In Shakespeare's 'Hamlet,' the word 'thee' refers to Prince Hamlet, and is spoken by Horatio as a farewell to the dying prince.
Step-by-step explanation:
The quote 'Good night, sweet prince,/And flights of angels sing thee to thy rest!' is from William Shakespeare's play Hamlet. In this line, the word 'thee' refers to Prince Hamlet himself, spoken by Horatio as Hamlet is dying. The line expresses Horatio's wish for Hamlet to have a peaceful journey into the afterlife, accompanied by angels. It is a poignant moment that captures the end of Hamlet's tumultuous life and the deep friendship between the two characters.