It is the duty of an attorney and counselor at law not to encourage either the commencement or continuance of an action or proceeding from any motive of passion or interest.

Source: PolC 1877, ch 18, § 4, subdiv 6; CL 1887, § 465, subdiv 6; RPolC 1903, § 697, subdiv 6; RC 1919, § 5262 (6); Supreme Court Rule 13, 1939; SDC 1939 & Supp 1960, § 32.1201 (6).