'Pure' in the Bible

You and God are witnesses of how pure, honest, and blameless our conduct was among you who believe.

so that He may strengthen and establish your hearts without blame in holiness in the sight of our God and Father at the coming of our Lord Jesus with all His saints (God’s people).

For this is the will of God, that you be sanctified [separated and set apart from sin]: that you abstain and back away from sexual immorality;

So whoever rejects and disregards this is not [merely] rejecting man but the God who gives His Holy Spirit to you [to dwell in you and empower you to overcome temptation].

Now may the God of peace Himself sanctify you through and through [that is, separate you from profane and vulgar things, make you pure and whole and undamaged—consecrated to Him—set apart for His purpose]; and may your spirit and soul and body be kept complete and [be found] blameless at the coming of our Lord Jesus Christ.