Proverbs 30:6

Do not add to His words
Or He will reprove you, and you will be proved a liar.

Deuteronomy 4:2

You shall not add to the word which I am commanding you, nor take away from it, that you may keep the commandments of the Lord your God which I command you.

Deuteronomy 12:32

Whatever I command you, you shall be careful to do; you shall not add to nor take away from it.

Job 13:7-9

“Will you speak what is unjust for God,
And speak what is deceitful for Him?

1 Corinthians 15:15

Moreover we are even found to be false witnesses of God, because we testified against God that He raised Christ, whom He did not raise, if in fact the dead are not raised.

Revelation 22:18-19

I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God will add to him the plagues which are written in this book;

Treasury of Scripture Knowledge

Summary

Add thou not unto his words, lest he reprove thee, and thou be found a liar.

General references

Bible References

Add

Deuteronomy 4:2
You shall not add to the word which I am commanding you, nor take away from it, that you may keep the commandments of the Lord your God which I command you.
Deuteronomy 12:32
Whatever I command you, you shall be careful to do; you shall not add to nor take away from it.
Revelation 22:18
I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God will add to him the plagues which are written in this book;

And

Job 13:7
“Will you speak what is unjust for God,
And speak what is deceitful for Him?
1 Corinthians 15:15
Moreover we are even found to be false witnesses of God, because we testified against God that He raised Christ, whom He did not raise, if in fact the dead are not raised.

General references

Deuteronomy 4:2
You shall not add to the word which I am commanding you, nor take away from it, that you may keep the commandments of the Lord your God which I command you.