Charles Ellicott Commentary Proverbs 27:6

"Faithful are the wounds of a friend; But the kisses of an enemy are profuse." — Proverbs 27:6 (ASV)

Faithful are the wounds of a friend— that is, the open rebuke of the previous verse, the smiting and reproof of Psalm 142:5.

The kisses of an enemy are deceitful— Rather, plentiful, showered upon one, but all meaningless.