No attorney shall by himself, or by or in the name of another person, either before or after action brought, promise, give, or procure, or permit to be promised or given any valuable consideration to any person as an inducement to placing in his hands, or in the hands of another person, any claim for the purpose of making a claim or bringing an action or special proceeding thereon, or defending the same; nor shall any attorney, directly or indirectly, as a consideration for such retainer, pay any expenses attending the prosecution or defense of any such claim or action.