(Devarim, Ibid.) "Do not lacerate yourselves" (lo tithgodedu): Do not form opposing factions (agudoth, agudoth), but all of you consolidate into one bond, as in (Amos 9:6) "and He founded His bond (agudah) upon the earth."
Variantly, "Do not lacerate yourselves," as others do, viz. (I Kings 18:29) "and they lacerated themselves, as was their custom."
"and do not make baldness between your eyes for the dead": I might think that there is liability only for (making baldness) between the eyes. Whence is it derived that the entire head is included? From (Vayikra 21:5) "They (the Cohanim) shall not make a baldness upon their heads" — the entire head is included. And whence is it derived that there is liability for each baldspot in itself? From "They shall not make a baldness (lit., "baldness, baldness"). I might think that only the Cohanim, to whom Scripture accorded additional mitzvoth, were liable for each baldspot and for the (entire) head as between the eyes, but not Israelites, to whom additional mitzvoth were not accorded. It is, therefore, written "baldness" (there) - "baldness" (here) for an identity (gezeirah shavah). Just as Cohanim are liable for the above, so, Israelites; and just as "baldness" in respect to an Israelite refers only to baldness only "for the dead," so, "baldness in respect to the Cohanim.