'Concerning' in the Bible

Let the teaching concerning Christ remain as a rich treasure in your hearts. In all wisdom teach and admonish one another with psalms, hymns, and spiritual songs, and sing with grace in your hearts to God.

At the same time pray for us, too, that God will open a door [of opportunity] to us for the word, to proclaim the mystery of Christ, for which I have been imprisoned;

All the things concerning me make known to you shall Tychicus -- the beloved brother, and faithful ministrant, and fellow-servant in the Lord --

whom I did send unto you for this very thing, that he might know the things concerning you, and might comfort your hearts,

Aristarchus, my fellow prisoner, greets you, as does Mark, Barnabas’s cousin (concerning whom you have received instructions: if he comes to you, welcome him),