'Blameless' in the Bible

Nevertheless, the high places were not removed from Israel, even though Asa's heart was blameless all of his life.

For the eyes of the Lord move to and fro throughout the earth so that He may support those whose heart is completely His. You have acted foolishly in this; therefore, from now on you will have wars.”

Then the king commanded them, “Do this in the fear of the Lord, faithfully and wholeheartedly.

He did right in the sight of the Lord, yet not wholeheartedly.