Charles Ellicott Commentary Psalms 30:7

"Thou, Jehovah, of thy favor hadst made my mountain to stand strong: Thou didst hide thy face; I was troubled." — Psalms 30:7 (ASV)

Lord, by thy favour — that is, and all the while You (not my own strength) had made me secure. The margin gives the literal rendering, but the reading varies between the text “to my mountain,” “to my honour” (Septuagint, Vulgate, and Syriac), and “on mountains,” the last involving the supply of the pronoun “me.”

The sense, however, is the same and is obvious. The mountain of strength, perhaps a mountain fortress, is an image of a secure retreat. Doubtless, Mount Zion was in the poet’s thought.

Thou didst ... — The fluctuation of feeling is well shown by the rapid succession of clauses without any connecting conjunctions.