Psalm 12:6-7 reads:
The exegetical evidence that Psalm 12:6-7 refers to the preservation of the words of Scripture is very strong. This text receives a chapter in Thou Shalt Keep Them: A Biblical Theology of the Perfect Preservation of Scripture. Exegetical questions are also discussed in the blog posts here and here. This post briefly examines a historical question--does the view that Psalm 12:6-7 (Psalm 12:7-8 in Hebrew, since v. 1 is considered to be the title in the Masoretic Text) refers to the preservation of words, rather than to the preservation of the poor and needy of v. 5 (not that God does not care for them also) exist in the history of interpretation? The following citations from both conservative and liberal commentators, from both those in Christendom and Jewish grammarians, demonstrates that the view that Psalm 12:6-7 promises the preservation of the words of Scripture is by no means a new view. While the position that words are being spoken of in Psalm 12:7 is the view advocated in some of these commentaries, in others the view that Psalm 12:7 refers to words and some support for this view is provided, while the commentator himself takes a different position for a variety of reasons.
Thus, it is clear that the position that Psalm 12:6-7 refers to the preservation of the Words of Scripture has been held by significant numbers of people in the history of interpretation--Jewish grammarians, Roman Catholics, Reformed Protestants, Arminian Protestants, theological liberals, and theological conservatives have all recognized this position.
(For sources for these citations, please see the original article here.)