1
לא יסיף. מִכָּאן אַזְהָרָה לַמַּכֶּה אֶת חֲבֵרוֹ (עי' כתובות ל"ג): לא יסיף HE SHALL NOT EXCEED — From here is derived the prohibition referring to one who strikes his fellow man (Sanhedrin 86b; cf. Ketubot 33a).
2
ונקלה אחיך. כָּל הַיּוֹם קוֹרְאוֹ רָשָׁע, וּמִשֶּׁלָּקָה קְרָאוֹ אָחִיךָ: ונקלה אחיך WHEN THY BROTHER SHOULD SEEM VILE [UNTO THEE] — All the time it has been calling him “wicked” (vv. 1 and 2), but as soon as he has received the lashes it calls him “thy brother”! (Sifrei Devarim 286:14).