'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 our hands have touched, concerning the word of life--

These [things] I have written to you concerning the ones who are trying to deceive you.

If we receive the testimony of people, the testimony of God is greater, because this is the testimony of God 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 testified concerning his Son.)