וַיֹּ֖אמֶר לֹ֣א תַעֲבֹ֑ר וַיֵּצֵ֤א אֱדוֹם֙ לִקְרָאת֔וֹ בְּעַ֥ם כָּבֵ֖ד וּבְיָ֥ד חֲזָקָֽה׃
Edom, porém, respondeu: Não passarás. E saiu-lhe ao encontro com muita gente e com mão forte.
Rashi on Numbers
וביד חזקה AND WITH A STRONG HAND — relying upon our ancestors’ assurance: (Genesis 27:22) “and the hands are the hands of Esau” (cf. Midrash Tanchuma, Beshalach 9 on בשלח)
Sforno on Numbers
ויצא אדום לקראתו, to face them at the border.
Siftei Chakhamim
With our grandfather’s assurance. For if not so, why does it say “a strong hand.” Any massive number of people constitutes a strong hand.