Revelation 22:18-19

I testify to every one that hears the words of the prophecy of this book: if any one add to these things, God will add to him the plagues that are written in this book.

Acts 2:40

And with many other words did he testify and exhort, saying: Save yourselves from this wicked generation.

Acts 20:21

bearing full testimony both to Jews and to Greeks, of the repentance that leads to God, and of the faith that leads to our Lord Jesus Christ.

Galatians 5:3

I testify indeed again to every man that is circumcised, that he is bound to do the whole law.

Ephesians 4:17

This I say, therefore, and appeal to you solemnly in the Lord, that you no longer walk as the other Gentiles walk, in the error of their minds,

1 Thessalonians 4:6

That no one take advantage of or injure his brother in this matter; because the Lord takes vengeance for all such things, as we also told you before, and fully testified:

Treasury of Scripture Knowledge

Summary

In those days saw I in Judah some treading wine presses on the sabbath, and bringing in sheaves, and lading asses; as also wine, grapes, and figs, and all manner of burdens, which they brought into Jerusalem on the sabbath day: and I testified against them in the day wherein they sold victuals.

Bible References

I testified

Acts 2:40
And with many other words did he testify and exhort, saying: Save yourselves from this wicked generation.
Acts 20:21
bearing full testimony both to Jews and to Greeks, of the repentance that leads to God, and of the faith that leads to our Lord Jesus Christ.
Galatians 5:3
I testify indeed again to every man that is circumcised, that he is bound to do the whole law.
Ephesians 4:17
This I say, therefore, and appeal to you solemnly in the Lord, that you no longer walk as the other Gentiles walk, in the error of their minds,
1 Thessalonians 4:6
That no one take advantage of or injure his brother in this matter; because the Lord takes vengeance for all such things, as we also told you before, and fully testified:
Revelation 22:18
I testify to every one that hears the words of the prophecy of this book: if any one add to these things, God will add to him the plagues that are written in this book.