'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.

But the high places [of idol worship] were not removed. Nevertheless, Asa’s heart was entirely devoted to the Lord all his days.