The words "lost or lose salvation" are nowhere found in the Bible.
As the Pulpit Commentary points out - Beware lest ye also, being led away with the error of the wicked, fall from your own steadfastness; rather, as in the Revised Version, lest, being carried away... ye fall. It is interesting to notice that the word rendered "led or carried away" is used by St. Paul, in Galatians 2:13, of St. Barnabas, who, along with St. Peter himself, was then "carried away" with the dissimulation of the Judaizers. The word rendered "wicked," rather "lawless," is used elsewhere in the New Testament only in chapter 2 Peter 2:7. The word for "steadfastness" (στηριγμός) occurs only here.
Proverbs 24:16 - For a righteous man may fall seven times And rise again, But the wicked shall fall by calamity.