What is the ruling regarding a man who says to his wife, "I don't want you and I am selling you," and repeats it, knowing that he intended to divorce her and deprive her of her daughter seven months ago?

Such phrases are كناية (allusive/indirect expressions) and do not constitute a divorce unless intended. The husband's statement that he intended divorce does not obligate him to anything. The husband should treat his wife with kindness and avoid mistreating her. It is advisable to avoid such phrases that hurt the wife's feelings.