Rashi on Deuteronomy 14:1/רש"י על דברים י״ד:א׳

1לא תתגדדו YE SHALL NOT CUT YOURSELVES — i.e. you shall not make cuttings and incisions in your flesh for the dead in the way the Amorites do (Sifrei Devarim 96:11), because you are children of the Lord and it is therefore becoming for you to be comely and not cut about and with hair torn out.

2בין עיניכם [NOR MAKE ANY BALDNESS] BETWEEN YOUR EYES — i.e. adjoining the forehead. In another passage (Leviticus 21:5), however, it states, “They shall not make their head bald”! It, however, intends to make the entire head like between the eyes (בֵּין עֵינַיִם) [i.e., one must not make bald spots on any part of the head]. (Sifrei Devarim 96:13; cf. Rashi on Leviticus 21:5 and Note thereon).