KJV:
Ye are witnesses, and God also, how holily and justly and unblameably we behaved ourselves among you that believe:
NASB:
You are witnesses, and so is God, how devoutly and uprightly and blamelessly we behaved toward you believers;
KJV:
And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ.
NASB:
Now may the God of peace Himself sanctify you entirely; and may your spirit and soul and body be preserved complete, without blame at the coming of our Lord Jesus Christ.