The hope, that you give to your enemy, should be long deferred to be fulfilled. When the time comes for fulfilling it, invent some pretext to defer it still. Let the pretext appear as founded on some reason and let that reason (also) appear as founded on some other reason.
आशां कालवतीं कुर्यात् कालं विघ्नेन योजयेत्। विजं निमित्ततो ब्रूयानिमित्तं वापि हेतुतः॥