Adam Clarke on Psalms 53:6

O that the salvation of Israel were come out of Zion! - I have already shown that the proper translation is, "Who shall give from Zion salvation to Israel?" The word salvation is in the plural here, deliverances: but many MSS., with the Septuagint, Vulgate, Arabic, and Anglo-Saxon, have it in the singular.

When God brinyeth back - When Jehovah bringeth back, is the reading of more than twenty of Kennicott's and De Rossi's MSS., with the Septuagint, Syriac, and Chaldee, and Justinianus' Polyglot Psalter.

For larger notes and an analysis, the reader is requested to refer to Psa 14:1-7; and for a comparison of the two Psalms he may consult Dr. Kennicott's Hebrew Bible, where, under Psa 14:1-7, in the lower margin, the variations are exhibited at one view.