Codependency is a state in which when one person enables another person's destructive behavior. The person with destructive behavior relies excessively on their enabler for emotional or psychological support.
Proverbs 24:24 warns those who enable sin:
Whoever says to the wicked, “You are in the right,”
will be cursed by peoples, abhorred by nations
Hopefortheheart.org created a PDF that addresses co-dependency Biblically. See the link below.