What is the religious ruling on a husband saying to his wife, "You are divorced, divorced," in a state of anger, when they both wish to reconcile, live in Germany, and have three children?

If you uttered the divorce while being aware of what you were saying, then your statement to your wife, "You are divorced, divorced," results in one divorce, unless you intended to issue two divorces. You may take her back before her waiting period (iddah) expires, provided you had not divorced her before, because if the divorce is less than three, the husband has the right to take her back during the iddah.