or struck him with his hand in enmity so that he died, then the one who struck him must surely be put to death — he is a murderer. The avenger of blood shall put the murderer to death when he encounters him.
In context
19The avenger of blood himself shall put the murderer to death; when he encounters him, he shall put him to death. 20If he pushed him out of hatred, or hurled something at him while lying in wait, so that he died, 21or struck him with his hand in enmity so that he died, then the one who struck him must surely be put to death — he is a murderer. The avenger of blood shall put the murderer to death when he encounters him. 22But if he pushed him suddenly, without hostility, or threw any object at him without lying in wait, 23or dropped any stone that could cause death on him without seeing him, so that he died, though he was not his enemy and was not seeking to harm him —