כָּרַ֨ע שָׁכַ֧ב כַּאֲרִ֛י וּכְלָבִ֖יא מִ֣י יְקִימֶ֑נּוּ מְבָרֲכֶ֣יךָ בָר֔וּךְ וְאֹרְרֶ֖יךָ אָרֽוּר׃
꿇어 앉고 누움이 수사자와 같고 암사자와도 같으니 일으킨 자 누구이랴 너를 축복하는 자마다 복을 받을 것이요 너를 저주하는 자마다 저주를 받을지로다
Rashi on Numbers
כרע שכב כארי HE CROUCHED, HE LAY DOWN AS A LION — Understand this as the Targum does (“He will have rest, he will dwell in strength like a lion”), meaning, they will be settled in their land in strength and might.
Sforno on Numbers
מברכיך ברוך. We know that this was the case already in Avraham’s time. Even in exile, Avraham;s descendants will be of benefit to the nations who host these exiles. (compare Deuteronomy 30,9)
Or HaChaim on Numbers
כרע שכב כארי, "He couched, he lay down like a lion, etc." Bileam extols the prowess of the Jewish people as being evident even when the nation is in repose, unarmed, etc. The nation relies on its reputation and does not fear attack even when lying down. The reason Bileam uses two different names for lions in this verse is once again in accordance with the way he divided the Jewish people into Jacob and Israel, i.e. into the average Israelite and the elite, respectively.