Parallel
Psalms 120:3
Swete's Septuagint · Berean Standard Bible
μὴ δῷς εἰς σάλον τὸν πόδα σου, μηδέ νυστάξει ὁ φυλάσσων σε.
121:3
He will not allow your foot to slip; your Protector will not slumber.