Tafsiran Mazmur 125:2: Radak & Ibn Ezra

יְֽרוּשָׁלִַ֗ם הָרִים֮ סָבִ֪יב לָ֥הּ וַ֭יהוָה סָבִ֣יב לְעַמּ֑וֹ מֵ֝עַתָּ֗ה וְעַד־עוֹלָֽם׃

Seperti gunung-gunung mengelilingi Yerusalem, demikianlah Yang Mahakekal mengelilingi umat-Nya, dari sekarang sampai selama-lamanya.

Radak

Jerusalem – Even though mountains surround her she lacks strength and the nations rule over her, conquering her one from another. And she will not have strength until the people of the Lord are within her, because then He will surround His people. Then His name will be a strength to them greater than mountains and the enemy will never again rule over them:
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Ibn Ezra

Jerusalem has mountains – because they stand around her, and the Lord surrounds His people within her. Therefore the enemy cannot come lay siege to Jerusalem:
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