Rashi: This hinted at David, who would attempt to destroy the nations, ¹ but whom Hashem would stop, as this will only become achievable with the advent of Mashi'ach.

Targum Yonasan: On the contrary, it hinted at the nations of the world, who would come to plunder the property of Avraham's descendants, but who would not succeed, due to the merits of Avraham.

Ramban: In similar vein, it hints at the nations of the world, who would try to block the Korbanos, but whom Avraham's descendants would chase away.