Deuteronomy 4 - ESV

You shall not add to the word that I command you, nor take from it, that you may keep the commandments of the Lord your God that I command you.
Deuteronomy 4:2 obedience law following
And he declared to you his covenant, which he commanded you to perform, that is, the Ten Commandments, and he wrote them on two tablets of stone.
Deuteronomy 4:13 covenant law following

But from there you will seek the Lord your God and you will find him, if you search after him with all your heart and with all your soul.
Deuteronomy 4:29 God reward soul
Know therefore today, and lay it to your heart, that the Lord is God in heaven above and on the earth beneath; there is no other.
Deuteronomy 4:39 God heaven world
Therefore you shall keep his statutes and his commandments, which I command you today, that it may go well with you and with your children after you, and that you may prolong your days in the land that the Lord your God is giving you for all time.
Deuteronomy 4:40 law obedience blessing