Does a divorce take effect if a person says to his mother, "If my wife leaves the house, tell her she is divorced," and the mother does not inform the wife, and then the wife leaves?

Divorce does not occur if the wife leaves the house without her knowledge of the husband's statement, whether it was a promise or a suspension of divorce, because divorce does not occur by a mere promise. If the husband intended to inform his wife that divorce was suspended on an action, but she did not know about it, and then she performed that action, she is not divorced. It is advisable to avoid suspending divorce with the intention of threatening the wife.