וְהָיָה֩ בֵית־יַעֲקֹ֨ב אֵ֜שׁ וּבֵ֧ית יוֹסֵ֣ף לֶהָבָ֗ה וּבֵ֤ית עֵשָׂו֙ לְקַ֔שׁ וְדָלְק֥וּ בָהֶ֖ם וַאֲכָל֑וּם וְלֹֽא־יִֽהְיֶ֤ה שָׂרִיד֙ לְבֵ֣ית עֵשָׂ֔ו כִּ֥י יְהוָ֖ה דִּבֵּֽר׃
야곱 족속은 불이 될 것이요 요셉 족속은 불꽃이 될 것이며 에서 족속은 초개가 될 것이라 그들이 그의 위에 붙어서 그를 사를 것인즉 에서 족속에 남은 자가 없으리니 이는 여호와께서 말씀하셨음이니라
Rashi
for the Lord has spoken—Now where did He speak? (Num. 24:19) “Out of Jacob shall come a ruler, and he shall destroy him that remains in the city.” [from Mechilta Bo 12:16, Pirké d’Rabbi Eliezer ch. 37]
Tze'enah Ure'enah
“The House of Jacob will be a fire and the House of Joseph a flame, etc.” [1:18]. Like the fire burns the straw, so will Jacob burn the nations. Therefore he says, a flame will come out of the house of Jacob and from the house of Joseph a fiery flame will come, when Joseph will overcome Esau.
Tze'enah Ure'enah
“There will be no survivor of the House of Esau, since the Lord has spoken” [1:18]. No person from Esau will remain; when the Holy One says it, it will certainly happen.