וְלֹ֤א יִשָּׁפֵךְ֙ דָּ֣ם נָקִ֔י בְּקֶ֣רֶב אַרְצְךָ֔ אֲשֶׁר֙ יְהוָ֣ה אֱלֹהֶ֔יךָ נֹתֵ֥ן לְךָ֖ נַחֲלָ֑ה וְהָיָ֥ה עָלֶ֖יךָ דָּמִֽים׃ (ס)
免得無辜人的血流在永恆者你的上帝賜給你為業的地上，流血的罪就歸到你身上。
Sifrei Devarim
(Devarim 19:10) "And innocent blood shall not be shed in the midst of your land that the L-rd your G-d gives to you as an inheritance": Beth-din is hereby being exhorted to this end.