Final answer:
Juliet is intended to sleep for 42 hours after consuming the potion given by Friar Laurence in Act 4 of Shakespeare's Romeo and Juliet.
Step-by-step explanation:
In Act 4 of Shakespeare's play Romeo and Juliet, Friar Laurence gives Juliet a potion designed to make her appear dead. After she consumes this potion, she is supposed to sleep for 42 hours. This deep slumber is part of a plan to reunite her with Romeo, away from the strife of their feuding families. The duration of Juliet's sleep is crucial for the plot, as it leads to the tragic climax where Romeo, finding her seemingly lifeless, takes his own life before Juliet awakens.