'Briefly' in the Bible

and that by [divine] revelation the mystery was made known to me, as I have already written in brief.

I call on you, brothers and sisters, listen [patiently] to this message of exhortation and encouragement, for I have written to you briefly.

By Silvanus, our faithful brother (as I consider him), I have written to you briefly, to counsel and testify that this is the true grace [the undeserved favor] of God. Stand firm in it!

I wrote something to the church; but Diotrephes, who loves to put himself first, does not accept what we say and refuses to recognize my authority.