'Blameless' in the Bible

Therefore, your hearts are to be wholly devoted to the Lord our God, to walk in His statutes and to keep His commandments, as [you are doing] today.”

He walked in all the sins [of idol worship] that his father [Rehoboam] committed before him; and his heart was not entirely devoted to the Lord his God, like the heart of his father (forefather) David.

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