'Heed' in the Bible

Only take diligent heed to do the commandment and the law which Moses the servant of Jehovah commanded you, to love Jehovah your God, and to walk in all his ways, and to keep his commandments, and to cleave unto him, and to serve him with all your heart and with all your soul.

Take good heed therefore unto yourselves, that ye love Jehovah your God.