בָּנִ֣ים אַתֶּ֔ם לַֽיהוָ֖ה אֱלֹהֵיכֶ֑ם לֹ֣א תִתְגֹּֽדְד֗וּ וְלֹֽא־תָשִׂ֧ימוּ קָרְחָ֛ה בֵּ֥ין עֵינֵיכֶ֖ם לָמֵֽת׃
너희는 너희 하나님 여호와의 자녀니 죽은 자를 위하여 자기 몸을 베지 말며 눈썹 사이 이마 위의 털을 밀지 말라
Sefer HaMitzvot
We have been prohibited from making a gash "for a life" in our flesh like the idolaters did. This is as it is said "Lo Titgodedu." This commandment has already been duplicated when it says "a gash for a life you shall not make..." (Leviticus 19:28) ... And there it explains that one who gashes in response to a death, whether by hand or with a utensil, is liable; [one who gashes] for idolatry, with a utensil is liable but by hand is exempt [from punishment], as comes from the explanation in the Navi, "And they gashed themselves like their manner with swords." (Melachim I 18:28). Behold, they said that in the category of this [law] is the prohibition against splitting the opinions of the town in their customs. They said, "Lo Tigodedu means don't make agudot (groups)" (Sifrei Devarim 96:10), but the main meaning of the text is like we explained, don't make a gash for the dead. This is like an interpretation of the text. So too, said [the Talmud in Sanhedrin 110], "one who holds on to a legal dispute violates a negative commandment, like it says, "do not be like Korach and his congregation," which is also like an interpretation of the text indeed the body of the text is meant to scare. And according to what the Sages ...