Proverbs 14:25

A truthful witness saves lives,
But he who utters lies is treacherous.

Proverbs 14:5

A trustworthy witness will not lie,
But a false witness utters lies.

Acts 20:21

solemnly testifying to both Jews and Greeks of repentance toward God and faith in our Lord Jesus Christ.

Acts 20:26-27

Therefore, I testify to you this day that I am innocent of the blood of all men.

Acts 26:16-20

But get up and stand on your feet; for this purpose I have appeared to you, to appoint you a minister and a witness not only to the things which you have seen, but also to the things in which I will appear to you;

1 Timothy 4:1-3

But the Spirit explicitly says that in later times some will fall away from the faith, paying attention to deceitful spirits and doctrines of demons,

2 Peter 3:3

Know this first of all, that in the last days mockers will come with their mocking, following after their own lusts,

Treasury of Scripture Knowledge

Summary

A true witness delivereth souls: but a deceitful witness speaketh lies.

Bible References

General references

Proverbs 14:5
A trustworthy witness will not lie,
But a false witness utters lies.
Acts 20:21
solemnly testifying to both Jews and Greeks of repentance toward God and faith in our Lord Jesus Christ.
Acts 26:16
But get up and stand on your feet; for this purpose I have appeared to you, to appoint you a minister and a witness not only to the things which you have seen, but also to the things in which I will appear to you;
1 Timothy 4:1
But the Spirit explicitly says that in later times some will fall away from the faith, paying attention to deceitful spirits and doctrines of demons,
2 Peter 3:3
Know this first of all, that in the last days mockers will come with their mocking, following after their own lusts,