"O proud Death, what feast is toward in thine eternal cell that thou so many princes at a shot so bloodily hast struck?" Lines 403-406.
Fortinbras speaks these words upon entering the hall where so many royalty have been slain. He personifies death by making it a proper noun and speaking directly to it as if it were a person itself. He gives it human qualities (i.e.Death feasts, it took princes, it is proud), which is essentially what personification is.