'Careful' in the Bible

But Jehu did not remain careful to walk in the instruction of the LORD God of Israel with all his heart. He never abandoned the sins of Jeroboam that had caused Israel to sin.

Furthermore, you are to be careful to observe forever the statutes, ordinances, law, and the commandment that he wrote for you. And you are not to fear other gods.

And I will not make Israel's feet to wander anymore from the land that I have given to their ancestors, if they will only be careful to do everything that I have commanded them according to the entire Law that my servant Moses commanded them."