Revelation 22:18-19
"I testify to every one who hears the words of the prophecy of this book, if anyone shall add to them, God will add to him the plagues that are written in this book;
Acts 2:40
Also with many other words he testified, and exhorted them, saying, "Be saved from this perverse generation!"
Acts 20:21
fully testifying, both to Jews and Greeks, repentance toward God, and faith toward our Lord Jesus.
Galatians 5:3
And I testify again to every man who is circumcised, that he is a debtor to do the whole law.
Ephesians 4:17
This, therefore, I say, and testify in the Lord, that ye no longer walk as the gentiles also walk, in the vanity of their mind,
1 Thessalonians 4:6
that he go not beyond and gain an advantage over his brother in the matter; because the Lord is an avenger of all these things, as we also told you before, and solemnly testified.