'Mortally' in the Bible

lest the avenger of blood pursue the manslayer, while his heart is hot, and overtake him, because the way is long, and strike him mortally; whereas he was not worthy of death, inasmuch as he didn't hate him in time past.

But if any man hates his neighbor, and lies in wait for him, and rises up against him, and strikes him mortally so that he dies, and he flees into one of these cities;