Why does the āyah end with "then Allah is surely Hearing, Knowing"?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. It implies that Allah hears the man's pronouncement of divorce and knows his intention.
2. It implies that Allah hears his oath and knows about it.