'Concerning' in the Bible

This is the John who taught the truth concerning the Word of God and the truth told us by Jesus Christ-- a faithful account of what he had seen.

Dismiss your fears concerning all that you are about to suffer. I tell you that the Devil is about to throw some of you into prison that you may be put to the test, and for ten days you will have to endure persecution. Be faithful to the End, even if you have to die, and then I will give you the victor's Wreath of Life.

And a voice said to me, "You must prophesy yet further concerning peoples, nations, languages, and many kings."