Through Silvanus, whom I regard as a faithful brother, I have written to you briefly, encouraging you and testifying that this is the true grace of God. Stand firm in it.
KJV
By Silvanus, a faithful brother unto you, as I suppose, I have written briefly, exhorting, and testifying that this is the true grace of God wherein ye stand.
ASV
By Silvanus, our faithful brother, as I account him, I have written unto you briefly, exhorting, and testifying that this is the true grace of God: stand ye fast therein.