genitive of purpose

Allied to the genitive of cause is the genitive of purpose in τοῦ with the infinitive (esp. with μή, 2032 e), and in expressions where ἕνεκα is usually employed, as ἡ πᾶσ᾽ ἀπάτη συνεσκευάσθη τοῦ περὶ Φωκέᾱς ὀλέθρου the whole fraud was contrived for the purpose of ruining the Phocians D. 19.76.