לִבְנֵי־קֹ֭רַח מִזְמ֣וֹר שִׁ֑יר יְ֝סוּדָת֗וֹ בְּהַרְרֵי־קֹֽדֶשׁ׃
A Psalm of the sons of Korah; a Song. His foundation is in the holy mountains.
Rashi on Psalms
whose foundation is on the mountains of the Sanctuary The foundation of this psalm; the Psalmist founded it on the mountains of Zion and Jerusalem.