'Now Concerning' in the Bible

if any one may will to do His will, he shall know concerning the teaching, whether it is of God, or -- I do speak from myself.

having commanded his accusers to come to thee, from whom thou mayest be able, thyself having examined, to know concerning all these things of which we accuse him;'

for the king doth know concerning these things, before whom also I speak boldly, for none of these things, I am persuaded, are hidden from him; for this thing hath not been done in a corner;