What is the ruling on obsessive thoughts and compulsive whispers of divorce that come to a husband, even though he does not intend it and does not utter it, knowing that the wife has not requested divorce and there are no problems between them?

There are no consequences for the thoughts and whispers of the soul. Therefore, divorce (talaq) or khul' does not occur due to such thoughts. The most effective cure for the ailment of intrusive thoughts (waswasah) is to ignore them and pay no attention to them.