Charles Ellicott Commentary Psalms 68:35

"O God, [thou art] terrible out of thy holy places: The God of Israel, he giveth strength and power unto [his] people. Blessed be God." — Psalms 68:35 (ASV)

Out of thy holy places — i.e., out of Zion. The plural “places” also occurs in Psalm 73:17 (Hebrew).