A.T. Robertson Commentary 2 Corinthians 8:7

"But as ye abound in everything, [in] faith, and utterance, and knowledge, and [in] all earnestness, and [in] your love to us, [see] that ye abound in this grace also." — 2 Corinthians 8:7 (ASV)

In this grace also (κα εν ταυτη τη χαριτ). This gifted church (1 Corinthians 12-14) had fallen behind in the grace of giving. Kindly irony in this allusion.