And we are sending along with them our brother who has proven his earnestness to us many times and in many ways, and now even more so by his great confidence in you.
KJV
And we have sent with them our brother, whom we have oftentimes proved diligent in many things, but now much more diligent, upon the great confidence which [I have] in you.
ASV
And we have sent with them our brother, whom we have many times proved earnest in many things, but now much more earnest, by reason of the great confidence which he hath in you.