לֹ֣א תַקִּ֔פוּ פְּאַ֖ת רֹאשְׁכֶ֑ם וְלֹ֣א תַשְׁחִ֔ית אֵ֖ת פְּאַ֥ת זְקָנֶֽךָ׃
Ne taillez pas en rond les extrémités de votre chevelure, et ne rase pas les coins de ta barbe.
Rashi
ופאת זקנם לא יגלחו NEITHER SHALL THEY RAZE THE CORNER OF THEIR BEARD — Because it is written in the prohibition addressed to the ordinary Israelites, (Leviticus 19:27) “thou shalt not destroy (תשחית) [the corners of thy beard]”, I might think if one took it (the hair) off with a מלקט or a רהיטני, tweezers or plane-like or file-like tools that may be used for destroying the hair, he is guilty of violating the law! Scripture therefore states here "they shall not raze off (לא יגלחו) the corner of their beard", the two statements supplementing each other, thus teaching that one is liable only for the use of an instrument the employment of which is termed גילוח (razing), and ,which at the same time, involves the destruction of the hair, and this results only from the use of a razor (Makkot 21a).
English Explanation of Mishnah Makkot
If a man makes a baldness on his head, or rounds the corner of his head, or mars the corner of his beard, or makes one cutting [in his flesh] for the dead, he is liable [to a flogging]. If he makes one cutting for five dead, or five cuttings for one, he is liable for each one. On [rounding] the head [he is liable] for two corners, one for one side and one for the other; On [marring] the beard [he is liable] for two [corners] on one side, for two on the other side, and for one lower down. Rabbi Eliezer says: “If they were all taken off at the same time he is liable only on one count.” Making a baldness on one’s head as a sign of mourning is prohibited in Deuteronomy 14:1 and Leviticus 21:5. Rounding the corner of one’s head and marring the corner of one’s beard are prohibited in Leviticus 19:27. Cutting one’s flesh for the dead is prohibited in Leviticus 19:28. All of these transgressions are punishable by flogging. Our mishnah now proceeds to list how many violations are contained in each of these commandments.
German Commentary
wer die Seitenenden seines Haupthaares rund abnimmt. Lev. 19, 27. Er entfernt das Haar der Schläfen, womit das Kopfhaar endet, so dass er die Schläfen mit den Stellen hinter dem Ohr und der Stirne gleich macht. Nach Maimonides ist nur die Entfernung der Enden mit dem Schermesser verboten, nach Tosaphot und R. Ascher dagegen auch mit der Scheere. Vgl. Magazin f. d. W. d. J. 1881 S. 127.