And will provide for him from where he does not expect. And whoever relies upon Allāh – then He is sufficient for him. Indeed, Allāh will accomplish His purpose. Allāh has already set for everything a [decreed] extent. [At Talaaq:3]
At the time when a divoice is taking place women may be afraid regarding the source of their provisions. This is a reassurance for them that no matter what happens Allah (Swt) will provide to them from where they do not expect. He will give to them as long as they believe that Allah (Swt) is sufficient for them.