Adam Clarke on Psalms 12:7

Thou shalt keep them - thou shalt preserve them - Instead of the pronoun them in these clauses, several MSS., with the Septuagint, the Vulgate, and the Arabic, have us. The sense is equally good in both readings. God did bring forth the Israelites from Babylon, according to his word; he separated them from that generation. and reinstated them in their own land, according to his word; and most certainly he has preserved them from generation to generation to the present day, in a most remarkable manner.