שַׁ֭אֲלוּ שְׁל֣וֹם יְרוּשָׁלִָ֑ם יִ֝שְׁלָ֗יוּ אֹהֲבָֽיִךְ׃
예루살렘을 위하여 평안을 구하라 예루살렘을 사랑하는 자는 형통하리로다
Ibn Ezra
His tabernacle was in Shalem – This is referring to Jerusalem. Perhaps she is called Shalem because she is perfectly positioned opposite the gate of heaven, or that she is fit to be in peace. Or perhaps they called her thus in a prayerful fashion, like “ask for the peace of Jerusalem…” (Tehillim 122:6)