וַֽיְהִי֙ אַֽחֲרֵי־כֵ֔ן וַיַּ֥ךְ דָּוִ֛ד אֶת־פְּלִשְׁתִּ֖ים וַיַּכְנִיעֵ֑ם וַיִּקַּ֥ח דָּוִ֛ד אֶת־מֶ֥תֶג הָאַמָּ֖ה מִיַּ֥ד פְּלִשְׁתִּֽים׃
Nachher schlug David die Philister und demütigte sie; David nahm Meteg Ha-Amma von den Philistern.
Rashi
Meseg Hoamoh. In Divrei Hayomim (I, 18:1) it's written, "Dovid took Goss from the hand of the Pelishtim." [Goss] is called Meseg Hoamoh because she was the stick that dominated all the Pelishtim. It was the king's metropolis because we do not find [associated with] any of the Pelishtim rulers [not] with Azoh, Ashdod, Akron [nor] Ashkelon,1This a reference to the Pelishtim rulers enumerated in Yehoshua 13:3. Rashi has left out the Avites, because he relies on Rav’s opinion in Chulin 60b that Avites were from Teimon and not from the Philistine people. a royal title. Only in reference Goss do we find [a royal title], "Akish, the king of Goss."2Shmuel I, 20:11.
Rashi
Hoamoh. This is the harness made of wood.3מֶתֶג means the reins. These are references to the control this city had over the Pelishtim.