'Diligently' in the Bible

“Only give heed to yourself and keep your soul diligently, so that you do not forget the things which your eyes have seen and they do not depart from your heart all the days of your life; but make them known to your sons and your grandsons.

You shall teach them diligently to your sons and shall talk of them when you sit in your house and when you walk by the way and when you lie down and when you rise up.

You should diligently keep the commandments of the Lord your God, and His testimonies and His statutes which He has commanded you.

“Be careful against an infection of leprosy, that you diligently observe and do according to all that the Levitical priests teach you; as I have commanded them, so you shall be careful to do.

“Now it shall be, if you diligently obey the Lord your God, being careful to do all His commandments which I command you today, the Lord your God will set you high above all the nations of the earth.