'Concerning' in the Bible

Concerning whom we have much to say, and hard to be interpreted in speaking of it, since ye are become dull in hearing.

But we are persuaded concerning you, beloved, better things, and connected with salvation, even if we speak thus.

and above over it the cherubim of glory shadowing the mercy-seat; concerning which it is not now the time to speak in detail.

By faith, Noah, oracularly warned concerning things not yet seen, moved with fear, prepared an ark for the saving of his house; by which he condemned the world, and became heir of the righteousness which is according to faith.

By faith Isaac blessed Jacob and Esau concerning things to come.

By faith Joseph when dying called to mind the going forth of the sons of Israel, and gave commandment concerning his bones.