ब्रूहीत्युक्तश्च न ब्रूयादुक्तं च न विभावयेत् । न च पूर्वापरं विद्यात् तस्मादर्थात् स हीयते ॥ ५६ ॥
sanskrit
Or who, being ordered to speak, does not answer, or does not prove what he has alleged; or who does not know what is the first (point), and what the second, fails in his suit.
english translation