The Odyssey
Homer
the example of Orestes in Book I, the prayer of Polyphemus in Book IX and the slaughter in Book XXII, which only ends with the peace of Athena in Book XXIV.
Hamlet
William Shakespeare
the mandate of the Ghost in scene 5 of Act I, the Mousetrap in scene 2 of Act III, and the revenge that is fulfilled only in the duel of scene 2 of Act V.