杀人须见血shā rén xū jiàn xiě

to kill a man you must draw blood/“～，救人须救彻。”洒家放你不下，直送兄弟到沧州。(《水浒全传》105) “To kill a man you must draw blood,to rescue a man you must see him to safety.” I still don’t feel at ease about you,brother. I’m going to escort you all the way to Cangzhou.