Is there any obligation, in order to ward off whispers (waswasah), if a man says to his wife "I have taken you back" many times, without a divorce having occurred or been uttered?

A man's statement to his wife, "I have taken you back," without a prior divorce, has no effect. This behavior increases obsessive thoughts (waswasah) and is not considered a praiseworthy precaution. Therefore, one should turn away from these obsessive thoughts.