He brought him down upon the knees
In the question: He subdued him. He conquered him.
(Modern Hebrew)
Translation
Expression (Hebrew)
הוֹרִיד אוֹתוֹ עַל הַבִּרְכַּיִם
Definition (Hebrew)
בְּהַשְׁאָלָה: הִכְנִיעַ אוֹתוֹ. נִצֵּחַ אוֹתוֹ.
(הָעִבְרִית הַחֲדָשָׁה)