Numbers 35:21

21 or if he have smitten him with his hand through anger, and the man should die, let the man that smote him be put to death by all means, he is a murderer: let the murderer by all means be put to death: the avenger of blood shall slay the murderer when he meets him.

Numbers 35:21 Meaning and Commentary

Numbers 35:21

Or in enmity smite him with his hand, that he die
Give him a blow with his fist, on some part of his body where life is most in danger, and which issues in death:

he that smote him shall surely be put to death, for he is a murderer;
and therefore, according to the original law, ought to die, without reprieve or pardon; and notwithstanding this law made for cities of refuge, which were to be denied him:

the revenger of blood shall slay the murderer when he meeteth him:
that is, when he is condemned, as both the Targums of Onkelos and Jonathan interpret it, after a hearing and trial of his case.

Numbers 35:21 In-Context

19 The avenger of blood himself shall slay the murderer: whensoever he shall meet him he shall slay him.
20 And if he should thrust him through enmity, or cast any thing upon him from an ambuscade, and the man should die,
21 or if he have smitten him with his hand through anger, and the man should die, let the man that smote him be put to death by all means, he is a murderer: let the murderer by all means be put to death: the avenger of blood shall slay the murderer when he meets him.
22 But if he should thrust him suddenly, not through enmity, or cast any thing upon him, not from an ambuscade,
23 or with any stone, whereby a man may die, unawares, and it should fall upon him, and he should die, but he was not his enemy, nor sought to hurt him;

The Brenton translation of the Septuagint is in the public domain.