וַתַּעֲרֹ֤ךְ יִשְׂרָאֵל֙ וּפְלִשְׁתִּ֔ים מַעֲרָכָ֖ה לִקְרַ֥את מַעֲרָכָֽה׃
以色列人和非利士人都擺開了陣勢，兩軍對陣。
Rashi
Yisroel deployed. Referring to Yisroel's battalions.13That is why the feminine form [וַתַּעֲרֹךְ] is used because it is referring to מַעֲרָכָה which is grammatically feminine.