כָּל־מַ֨כֵּה־נֶ֔פֶשׁ לְפִ֣י עֵדִ֔ים יִרְצַ֖ח אֶת־הָרֹצֵ֑חַ וְעֵ֣ד אֶחָ֔ד לֹא־יַעֲנֶ֥ה בְנֶ֖פֶשׁ לָמֽוּת׃
Whoso killeth any person, the murderer shall be slain at the mouth of witnesses; but one witness shall not testify against any person that he die.
Targum Jonathan on Numbers
Whosoever killeth a man, according to the word of witnesses fit to give testimony against him, the avenger of blood, or the house of judgment, shall put him to death. But one witness only shall not testify against a man to put him to death.