אִ֤ישׁ מֵרֵעֵ֙הוּ֙ הִשָּׁמֵ֔רוּ וְעַל־כָּל־אָ֖ח אַל־תִּבְטָ֑חוּ כִּ֤י כָל־אָח֙ עָק֣וֹב יַעְקֹ֔ב וְכָל־רֵ֖עַ רָכִ֥יל יַהֲלֹֽךְ׃
Waspadalah kalian masing-masing terhadap sesamanya, dan janganlah percaya kepada saudara mana pun, sebab setiap saudara pasti diam-diam mengintai, dan setiap sesama berkeliling menyebarkan fitnah.
Radak
ויאמר, when Esau heard that his brother had used subterfuge to obtain the blessing by making his hands appear as if they were hairy, he said: הכי קרא שמו יעקב, “he was called the crooked one for good reason!” The letter ה at the beginning of the word הכי serves as confirmation of something, as if to say: “truly!” We find it used in a similar sense in Kings I 21,19 הרצחת וגם ירשת!, “ You not only murdered but meant to inherit!” Or, Numbers 20,10: המן הסלע הזה! “from this very rock!” Esau said that Yaakov had truly deserved the name they had given him at birth. Actually, the word יעקב has two connotations; one is connected to deviousness, deceit, as in Jeremiah 17,10 עקוב הלב , “the heart is full of deceit;” or, also from Jeremiah 9,3 כי כל אח עקוב יעקב, “every brother takes advantage.” On the other hand, the word also is derived from עקב, heel, not a negative connotation at all, but possibly a positive one, suggesting humility, modesty, the opposite of pushiness. Yaakov combined both qualities.