What we understand from his words is that they were a threat of divorce, but not actually issuing a divorce. Because the husband made up with his wife and did not divorce after that, no divorce actually occurred.
We advise the husband to avoid using the words of divorce (talaaq), because divorce is not prescribed as an outlet for anger, and repeatedly using such words destroys trust between the spouses and exposes the family to destruction.
We ask Allah to set the affairs of all of us straight.
And Allah knows best.