וְהָי֨וּ לָכֶ֧ם הֶעָרִ֛ים לְמִקְלָ֖ט מִגֹּאֵ֑ל וְלֹ֤א יָמוּת֙ הָרֹצֵ֔חַ עַד־עָמְד֛וֹ לִפְנֵ֥י הָעֵדָ֖ה לַמִּשְׁפָּֽט׃
這些城要作你們的避難所，躲避報血仇的人，使殺人者不至於死，直到他站在會眾面前受審判。
Rashi
מגאל — [AND THE CITIES SHALL BE UNTO YOU AS A REFUGE] מגאל — i.e. as a refuge on account of the avenger of blood, — he who is the near relative of the murdered man.
Rabbeinu Bahya
למקלט מגואל, “as a refuge from the avenger.” The reference is to a family member of the slain person who would act as his avenger.
Chizkuni
למקלט מגואל, “as refuge from the potential avenger of the slain person.” They are to calm the fears of the person who killed unintentionally who worries about becoming the victim of such relatives of the slain person.