Vine's Expository Dictionary: View Entry
TDNT Reference: 1:17,3
ἀγαθοποιέω agathopoiéō, ag-ath-op-oy-eh'-o; from G17; to be a well-doer (as a favor or a duty):—(when) do good (well).
The KJV translates Strong's G15 in the following manner: do good (7x), well doing (2x), do well (2x).
to do good, do something which profits others
to be a good help to someone
to do someone a favour
to benefit
to do well, do right
Strong's Number G15 matches the Greek ἀγαθοποιέω (agathopoieō),
which occurs 11 times in 10 verses
in the TR Greek.