Acts 20:21

testifying both to Jews and to 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 to the things which you have seen of me, and also to the things in which I will appear to you;

1 Timothy 4:1-3

Now the Spirit expressly says that in later times some will fall away from the faith by giving heed to deceitful spirits and doctrines of demons,

2 Peter 3:3

First of all you must understand this, that scoffers will come in the last days, with scoffing, following their own lusts

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

Acts 20:21
testifying both to Jews and to 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 to the things which you have seen of me, and also to the things in which I will appear to you;
1 Timothy 4:1
Now the Spirit expressly says that in later times some will fall away from the faith by giving heed to deceitful spirits and doctrines of demons,
2 Peter 3:3
First of all you must understand this, that scoffers will come in the last days, with scoffing, following their own lusts