'Concerning' in the Bible

What was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and touched with our hands, concerning the Word of Life—

These things I have written to you concerning those who are trying to deceive you.

If we receive the testimony of men, the testimony of God is greater; for the testimony of God is this, that He has testified concerning His Son.

The one who believes in the Son of God has the testimony in himself; the one who does not believe God has made Him a liar, because he has not believed in the testimony that God has given concerning His Son.