'Diligently' in the Bible

Only take heed to thyself, and keep thy soul diligently, lest thou forget the things that thine eyes have seen (and lest they depart from thy heart all the days of thy life; but thou shalt make them known to thy sons and to thy sons' sons),

Ye shall diligently keep the commandments of Jehovah your God, and his testimonies, and his statutes, which he hath commanded thee.

And it shall come to pass, if ye hearken diligently unto my commandments which I command you this day, to love Jehovah your God, and to serve him with all your heart and with all your soul,

For if ye diligently keep all this commandment which I command you this day to do it, to love Jehovah your God, to walk in all his ways, and to cleave unto him,

then shalt thou inquire, and make search, and ask diligently; and if it be truth, and the thing be certain, that this abomination hath happened in the midst of thee,

if thou only diligently hearken unto the voice of Jehovah thy God, to take heed to do all this commandment which I command thee this day.

And it shall come to pass, if thou shalt hearken diligently unto the voice of Jehovah thy God, to take heed to do all his commandments which I command thee this day, that Jehovah thy God will set thee supreme above all nations of the earth;