I showed you that David committed adultery and murder without losing his salvation. Now you're dancing around the mulberry bush about it.
You are the one that claims that David was saved before he committed adultery.
You claim that David did not lose his salvation even though he committed adultery.
Neither claim can be substantiated.
My claim is that salvation does not happen until the day of redemption.
My claim is that David repented of his sin and then endured in the faith until the end, just as we are commanded to do.
David found favor in God's eyes despite the adultery because David did what was right in the eyes of God and lived in obedience to God's will.
For Christians, we too can get past occasionally falling into temptation in our Christian life if we repent and the rest of our walk is characterized by doing right in the eyes of God and living in obedience to God's will.
That is different than the version of OSAS that teaches that we can get away with doing all kinds of evil so long as we once believed.