Deuteronomy 12:32

Whatsoever be the thing which I am commanding you, the same, shall ye observe to do, - thou shalt neither add thereunto, nor take away therefrom.

Deuteronomy 4:2

Ye shall not add unto the word which, I, am commanding you, neither shall ye take away therefrom, - that ye may keep the commandments of Yahweh your God, which, I, am commanding you.

Joshua 1:7

Only be very firm and bold, taking heed to do according to all the law which Moses my servant commanded thee, do not turn aside therefrom, to the right hand or to the left, - that thou mayest prosper, whithersoever thou goest.

Proverbs 30:6

Do not add unto his words, lest he convict thee, and thou be found false.

Revelation 22:18-19

I, bear witness, unto every one that heareth the words of the prophecy of this scroll: - If anyone shall lay aught upon them, God, will lay upon him, the plagues which are written in this scroll;

Deuteronomy 13:18

so long as thou shalt hearken unto the voice of Yahweh thy God, to keep all his commandments, which I am commanding thee to-day, - to do what is right in the eyes of Yahweh thy God.

Matthew 28:20

Teaching them to observe all things whatsoever I myself have commanded you, And lo! I, am, with you, all the days, until the conclusion of the age.

Treasury of Scripture Knowledge

Summary

What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.

Bible References

Thou shalt not

Deuteronomy 4:2
Ye shall not add unto the word which, I, am commanding you, neither shall ye take away therefrom, - that ye may keep the commandments of Yahweh your God, which, I, am commanding you.
Deuteronomy 13:18
so long as thou shalt hearken unto the voice of Yahweh thy God, to keep all his commandments, which I am commanding thee to-day, - to do what is right in the eyes of Yahweh thy God.
Joshua 1:7
Only be very firm and bold, taking heed to do according to all the law which Moses my servant commanded thee, do not turn aside therefrom, to the right hand or to the left, - that thou mayest prosper, whithersoever thou goest.
Proverbs 30:6
Do not add unto his words, lest he convict thee, and thou be found false.
Matthew 28:20
Teaching them to observe all things whatsoever I myself have commanded you, And lo! I, am, with you, all the days, until the conclusion of the age.
Revelation 22:18
I, bear witness, unto every one that heareth the words of the prophecy of this scroll: - If anyone shall lay aught upon them, God, will lay upon him, the plagues which are written in this scroll;

General references

Genesis 6:22
And Noah did so , - according to all that God commanded him, so did he.
Genesis 21:4
And Abraham circumcised Isaac his son, when eight days old, - as God commanded him.
Leviticus 8:4
And Moses did, as Yahweh commanded him, - and the assembly was called together, unto the entrance of the tent of meeting.
Numbers 1:54
Thus did the sons of Israel, - according to all that Yahweh commanded Moses, so, did they.
Deuteronomy 1:18
So I commanded you at that time all the things which ye should do.
Deuteronomy 4:2
Ye shall not add unto the word which, I, am commanding you, neither shall ye take away therefrom, - that ye may keep the commandments of Yahweh your God, which, I, am commanding you.
Deuteronomy 11:32
Therefore shall ye observe to do all the statutes and the regulations, - which I am setting before you to-day.
Psalm 119:4
Thou, hast commanded thy precepts, that they should be diligently kept.