Psalms 12:6  NRSVue

There are few scriptures that allude to the perfection of the word of God, and there may be none better within the Old Testament than what David prophetically writes here in his worship of YHWH. Psalm 12 was written as a plea for help in a time where the world was full of nothing but evil and trouble. It is here where David presents his cries to the Lord, wherein he feels utterly alone in his devotion, and utterly dependent on the promises of God.
The Hebrew word for promises is: ??????? ’imrâ; or ??????? ’emrah, which translates as: 'word, speech, commandment, or utterance.' In ancient Hebrew culture, this was also applied to mean the word of God in the form of the Torah, the written law of God through his divinely revealed scriptures. This view was invariable as far as we can tell today.
The Hebrew word for pure is ?????? ?âhôr; or ????? tahor, which translates as: 'pure in any sense (physical, moral, ethically, ceremonially); clean, fair, purer'... In other words, when used in the scriptural context, the word 'pure' is essentially universal in application to what it is referencing.
In this same light, it is worth noting that God the father, and Christ the son, oftentimes spoke in apodictic language form, which means: 'irrefutable, universal, absolute; meant to show the supreme morality, power, and authority of the one communicating it.' (See article on Apodictic).
If we are to take our scriptures as divinely inspired and authoritative, then we must apply that view to the entirety of the text (in legitimate translations and preserved original manuscripts); that text which has already been preserved throughout a 1950 year time period. This text which has survived the rise and fall of empires, cultures, and has permeated throughout this entire age, and stands as the most sold book of all time.
Psalms 12:6 affirms for us that we can rely on the Lord's purified and preserved word. The word of God, in all of its true forms, must be seen in the same lens, whether it is spoken or written. After all, what do we call the Bible, even older than this very name? For time immemorial, it has simply been called: "The word of God".
When all else failed, David had only the promises, the word of God, to guide him.

Word Unveiled 
https://youtube.com/@thewordunveiled707?si=CzciRmoAigtZXnFX