「何が(なにが)現れても(あらわれても)絶対に(ぜったいに)声(こえ)を出してはならない(だしてはならない)」

The old man was an immortal named Tekkanshi. He took Toshishun to Mount Emei and made him promise, 'I will step out for a bit, but no matter what terrifying monsters appear, you must never make a sound.' While Toshishun waited alone, fearsome gods and beasts appeared to threaten his life, but he did not speak a single word.